He cannot wear the ihraam garments – can he enter ihraam in his own clothes?
Question

                There is a man who wants to perform ‘Umrah, but he cannot wear the ihraam garments because he is handicapped and paralyzed. Can he do ‘umrah in his own clothes, and does he have to offer kafaarah (expiation)?.
Praise be to Allah.Yes, if a person is unable to wear the ihraam garments, 
    then he may wear whatever is suitable of other, permissible clothing. 
    According to the scholars he has to slaughter a sheep and distribute its 
    meat to the poor, or feed six poor persons, giving each one half a saa’ of 
    food, or fast for three days.
This is what the scholars said, by analogy with what was 
    narrated about shaving the head, as Allaah says (interpretation of the 
    meaning):
“and do not shave your heads until the Hady reaches 
    the place of sacrifice. And whosoever of you is ill or has an ailment in his 
    scalp (necessitating shaving), he must pay a Fidyah (ransom) of either 
    observing Sawm (fasts) (three days) or giving Sadaqah (charity — feeding six 
    poor persons) or offering sacrifice (one sheep)”
[al-Baqarah 2:196]
And the Prophet  (peace and blessings of Allaah be 
    upon him) explained that fasting means fasting for three days, giving 
    Sadaqah (charity) means feeding six poor persons, giving each one half a 
    saa’, and that sacrificing means slaughtering one sheep. The sacrifice and 
    feeding of the poor in this case should be done in Makkah, in order to be on 
    the safe side, because his breaking the rule concerning clothing will last 
    until he exits ihraam.