First of all- sorry for your loss.
Secondly- I would strongly suggest that you hold off on any permanent changes right now. You are in shock and, even more so, your Dad is reeling from injuries, guilt and loss right now. If he was competent and capable last month, he likely will be again.
Over the winter I suddenly lost my Dad and, to be honest, my mother's initial state of mind scared me. She acted fragile and confused whereas she was always as mentally competent as you and me. It took time for the shock to wear off and for her to be back to being sharp.
My Mom immediately moved in with us, so I am not saying that is a bad decision, but I am saying that you should hold off before making any permanent changes. I know the lawyer, etc., rec. not making anything final for at least a year to allow time to heal. For us, my Mom living with us is a good move- she lived a quarter of a mile away so was already entrenched in the community, never lived alone and at 81 why should she be lonely, has always had a mother-son relationship with my husband and we already had a master bedroom on the main level which could easily be made into hers. Even so, 10 months later and we still need to clean out the house and put it on the market.
Having the time to think about it and having it a mutual decision, rather than making her feel needy and dependent, I think has made a big difference in the healing process, although that has admittedly been very slow regardless. I know it has been important to her state of mind to feel she is here because she is family and for the company, not because she needs to be. If you erode your father's confidence and make him feel totally dependent, at this stage in his life he is likely never to recover and will be dependent.
You can probably tell from my rambling that we are still in the healing process. Please think about taking your time- for everyone's sake. It is way too soon to sell your father's stuff and you will likely get rid of things that, when your minds clear, you will regret. Take time to mourn, allow your father time to regain his sensibilities and, with a lot of love and some nurturing, he will likely get back his mental faculties and then, as a family, you can decide what living arrangements are best for all.