Can he open a store to do cupping in return for payment?
Question

                Is it permissible to open a store to do cupping and take payment from people for that?.
Praise be to Allah.
    The scholars differed concerning the earnings of a cupper – 
    is that makrooh or permissible without being makrooh? The reason why they 
    differed is that they differed in their understanding of the ahaadeeth that 
    have been narrated concerning that. 

    Among the ahaadeeth which describe the earnings of a cupper 
    as makrooh are the following: 

    1 – The Prophet  (peace and blessings of Allaah be upon 
    him) said: “The earnings of a cupper are khabeeth (evil).” Narrated by 
    Muslim (1568) 

    2 – The Prophet  (peace and blessings of Allaah be upon 
    him) said: “The worst of earnings are the wages of a prostitute, the price 
    of a dog and the fee of a cupper.” Narrated by Muslim (1568). 

    3 – It was narrated that Abu Hurayrah (may Allaah be pleased 
    with him) said: The Messenger of Allaah  (peace and blessings of Allaah 
    be upon him) forbade the earnings of a cupper. Narrated by Ahmad (7635), 
    al-Nasaa’i (4673), Ibn Maajah (2165); classed as saheeh by al-Albaani in 
    Saheeh al-Nasaa’i. 

    Among the ahaadeeth which mention a concession allowing that 
    are the following: 

    1 – The report narrated by al-Bukhaari (2102) and Muslim 
    (1577) from Anas ibn Maalik (may Allaah be pleased with him) who said: Abu 
    Taybah treated the Messenger of Allaah  (peace and blessings of Allaah 
    be upon him) with cupping and he ordered that he given a saa’ of dates. 

    2 – The report narrated by al-Bukhaari (2103) and Muslim from 
    Ibn ‘Abbaas (may Allaah be pleased with him) who said: “The Prophet  
    (peace and blessings of Allaah be upon him) was treated with cupping and he 
    gave something to the one who treated him. If it had been haraam he would 
    not have given him anything.” This is the wording of al-Bukhaari. He also 
    narrated another version (2278) which says: “And he gave the cupper his 
    wages; if he knew that it was makrooh he would not have given him anything.” 
    And Muslim (1202) narrated: “If it were haraam the Prophet  (peace and 
    blessings of Allaah be upon him) would not have given him anything. 

    The majority of scholars are of the view that when all of 
    these ahaadeeth are taken together, the prohibition may be understood as 
    meaning that it is makrooh. 

    Ibn Qudaamah (may Allaah have mercy on him) said: It is 
    permissible to hire a cupper to treat one with cupping, and his earnings are 
    permissible. This is the view favoured by Abu’l-Khattaab and it is the 
    opinion of Ibn 'Abbaas. It is also the view of Maalik, al-Shaafa’i and 
    as-haab al-ra’y. Al-Qaadi (i.e., Abu Ya’la, who was a Hanbali) said: The 
    wages of a cupper are not permissible, and he mentioned that Ahmad stated 
    that in several places and said: If he is given something without a (formal) 
    contract or stipulating that, he may take it and dispose of it in feeding 
    his animals or feeding his slaves or on the tools of his trade, but it is 
    not permissible for him to consume it. Among those who regarded the earnings 
    of a cupper as makrooh were ‘Uthmaan, Abu Hurayrah, al-Hasan and al-Nakha’i, 
    because the Prophet  (peace and blessings of Allaah be upon him) said: 
    “The earnings of a cupper are khabeeth (evil)” (narrated by Muslim) and he 
    said of the earnings of a cupper: “Feed it to your camel and your slaves” 
    (narrated by Ahmad and al-Tirmidhi (1277), classed as saheeh by al-Albaani 
    in Saheeh al-Tirmidhi. 

    The fact that this is permissible and not haraam is also 
    indicated by the report narrated by Ibn ‘Abbaas who said: The Prophet  
    (peace and blessings of Allaah be upon him) was treated with cupping and he 
    gave the cupper his wages; if he knew it was haraam he would not have given 
    it to him.” Agreed upon. According to another version: “if he knew it was 
    khabeeth (evil) he would not have given it to him.” The words of the Prophet 
     (peace and blessings of Allaah be upon him) regarding the earnings of a 
    cupper, “Feed it to your slaves,” indicates that his earnings are 
    permissible, because it is not permissible for him to feed his slaves with 
    food that is haraam to eat, for slaves are human and the things that Allaah 
    has forbidden are forbidden to them just as they are forbidden to those who 
    are free. Calling it khabeeth (evil) earnings does not necessarily mean that 
    it is haraam, because the Prophet  (peace and blessings of Allaah be 
    upon him) called garlic and onions khabeeth even though they are 
    permissible. 

    Rather the Prophet  (peace and blessings of Allaah be 
    upon him) disliked that for one who is free because this type of work is not 
    befitting for a free man. The fact that the Prophet  (peace and 
    blessings of Allaah be upon him) told him to give it to his slave indicates 
    that it is permissible. The prohibition on eating it is to be understood as 
    meaning that it is makrooh, not haraam. End quote from al-Mughni 
    (6/133). 

    Based on this, there is no sin on you if you open this shop, 
    and the fees that you take from people for that are not haraam. 

    And Allaah knows best.