I am sorry to hear this. Has your father had an X-ray and evaluation of his knee to make sure there is no hidden fracture/injury from the fall also?
If he refuses to put any weight down due to pain, and movement is necessary for his recovery, he will need 24-7 care and possibly lift assisting devices as mentioned by earlier poster. Without movement/frequent respiratory care/ he may easily develop pneumonia. Rehab/Nursing home care may be best.
This will be difficult, but not impossible to take care of at home. May or may not be less expensive, depending on services. You would definitely need hospital bed with overhead triangle pull that he can use to help lift himself, wheelchair, bedside commode/bedpans (if he can not do one leg weighted transfer). Home OT/PT/health aide/home nurse visits.
My heart goes out to you, fractured hips/pelvis are a frequent downfall of the elderly. Your Dad will need much care to stay on top of things and get healthy again.
Contacting a Social Worker at the hospital may give you some helpful advice, referral.
Best Wishes to you and your Dad.
If you do tackle this at home, make sure you and your family take some time for yourselves to rest and recover. Respite care is vey important.