We need to find a good app/website for them to send rent as well, preferably one that has many things built into it, making it more simple to manage things in one place.

I’d like to keep the current fixed-rate mortgage in place and, if possible, have the debt transferred to the LLC as well.

One of the best places to see what's out there in your area is to check Airbnb AND Pricelabs. 

She placed my wife and my wife's siblings as remaindermen on a life estate deed on my mother-in-laws home.

By creating a process, you can prevent these issues from taking place and save yourself a lot of time, trouble, and money.

The guy I bought the building from rented to said tenant WHILE HE WAS IN THE PROCESS of being evicted from another property.The tenant was a borderline hoarder that quit paying rent in December and then left the place a mess.

And, at that time and place, it would arguably be silly NOT to do so. 100%.This post was biased towards San Francisco, and California more general to include Los Angeles and San Diego, today in 2024.

They're pretty organized, but expect annual inspections and some extra paperwork. 

For example he is trying to place a bookcase door to access a small amount of storage from the bathroom.  

Paint and carpet are tough enough to organize remotely.