Off topic:
What kind of wheelchair will you buy? He should be "fitted" for one. (a Physical Therapist should measure him and reccomend the r i ght chair) Also if you expect him to sit in the chair for hours at a time, consider a seat cushion made by Jay (Sunrise Medical), Roho low profile, or Invacare. (Therapist will know about this). It hurts to sit in a chair too long everyday.