Renting out dry-cleaning equipment to the worker for a monthly rent
Question

                Can I rent out dry-cleaning equipment for a fixed monthly rate of 6000 riyals; in other words, the worker puts in his effort and experience and the owner puts in the equipment, on the basis that the worker will get whatever he earns over 6000 riyals? Please reply with evidence.
Praise be to Allah.
    There is nothing wrong with renting out a dry-cleaning shop 
    or renting out the equipment only, or renting out both together, to the 
    worker for this amount of money (6000 riyals) per month, or more or less 
    according to whatever they agree to, because this is a kind of renting that 
    is permissible according to sharia. The equipment remains the property of 
    the owner and goes back to him when the rental agreement comes to an end, 
    and he is responsible for its maintenance throughout that period, because he 
    is the owner and it is a trust in the hand of the worker, who is not liable 
    for anything that goes wrong with it unless he is responsible for some 
    transgression or negligence, such as loading the machines with more than 
    they can bear or some shortcoming in maintenance. 

    The worker has to pay the rent whether he works or not, and 
    whether he makes a profit or loss. This rental is the same as any other, 
    such as if he rented a house or a car or digging equipment or harvesting 
    equipment and so on.  

    But this operation may be shared between the two parties (the 
    owner of the dry cleaners and the worker), in which case they come under the 
    rulings on partnerships and not the rulings on rentals. What determines that 
    is the nature of the agreement between the two parties. We have given our 
    answer on the assumption that it is a rental, based on what the questioner 
    said. If the questioner wants to send us the details of the contract so that 
    we may examine it and see whether it is a partnership or a rental, that is 
    up to him. 

    And Allaah knows best.