If UCGal’s assumptions are correct, why not sell the MM house now and get the disabled person into a living situation that makes sense, whether a smaller rental or assisted living place. It certainly makes no sense for them to stay in a 5-bedroom house.
A big, older house like that will likely get a big family and plenty more wear and tear on the house and yard. Whether it is sold now or later it certainly makes sense to do a total fix-up and paint-up beforehand to maximize the price.
Property managers usually get about 10% of the rent, and are seldom worth it. Unlike the owner, they seldom have the incentive to minimize costs and they have lots of leeway for shenanigans in hiring and contracting work to be done, taking their time in renting it out, etc.
