The children of the people who have passed on don't want to be bothered and some homes have been sold for very small amounts.  

Replacing a bathtub with a shower can make narrow bathrooms feel larger and more modern.That said, consider keeping at least one bathtub in the building for market appeal, as families with small children or certain renters may prefer it.

Providing relocation assistance to tenants, for example, if I want to sell the property or move back in - this can range from one month's rent to thousands of dollars (e.g tenant has a disability, minor children, elderly it will cost you more), depending on the city.

A lawyer might be able to answer this better, but most rentals fall under fair housing laws (there are exceptions) and that protects against discrimination based on familial status which means children or someone who is pregnant.

General Partner is elderly fatherb.  12 Limited partners - all children , spouses not included - cheaper by the dozenc.

I lived in a college town and student rentals did very well as did STRs for parents coming in to visit their children.  

Many of the recipients are single mothers who actually want to find stable housing for themselves and their children so initially they are looking for the best house they can find and it is only when time is running out and their voucher is expiring (Yes that is a thing) that they begin lowering their standards and will settle for a cheaply put together home. 

I check to see how the dogs behave with people, ideally also with children, with dogs, and with cats.  

However, my work involves a lot of late nights and it’s starting to take a toll on me, especially with two young children.  

and I gotta tell you it's really fun to get to see the impact of my legacy gifts while I'm still around to watch my children prosper.