Next steps for elderly father and moving into a care facility.

He is not in good health any longer. He got hit as an elder with 2 life threatening events from which when he finishes rehab may not bring him back to 100% baseline. Before discharge, try to line up a family meeting to see if he will reach his goals. The key question will be a safe discharge and if he can still live alone for several hours without care.

Its not safe for him to be at home anymore, certainly not with dementia. Get him diagnosed at the hospital with a MoCA or SLUMS test that's scored on a scale from 1-30. If he scores 18-25 = mild cognitive impairment, – 10-17= moderate cognitive impairment and – less than 10= severe cognitive impairment. As POA, you can place him in Memory Care Assisted Living w/o his agreement if he scores poorly on the test and gets a dx of dementia. Get him evaluated for agitation as well and medicated accordingly. He's likely further along than you realize.

Best of luck to you.

Are you POA? Because if not you cannot make this decision for him. And quite honestly, if he is not legally incompetent under the law you still cannot. If you discuss with him and he is amendable to this move you are actually well past the time when it's appropriate if he will agree to it, and one of the easier way to accomplish it is with the help of the hospital Social Workers or rehab social workers.

Now you mention he is combative and unreasonable.
There's the rub.
He will not be kept at a facility if this is the case, so it is time to discuss medications that may help. When you look at the admissions packets for ALF/MC they will enumerate the circumstances under which a resident will be requested to leave. And they are exactly those circumstances you mention.

Work cut out for you and I can only wish you good luck. You know your Dad and you more know the answer to your own question that does a Forum full of strangers. Hope you'll update us as you go; your experience can help others.