Imho, you should find an agent that only does investor deals, and you should expect to receive a hand picked list of properties on a regular basis.

The regular numbers you might collect for Cap ex and Maintenance might need more of a contribution than a home without settling issues. 

I have a guard over a regular thermostat as 1 of my tenant would open their windows, in the middle of winter, as it was too hot!! 

It also may reduce your marketing or your niche area so you can have your action area within an hour drive to respond to calls for emergencies or regular maintenance.

With the COVID scare, stock market crashing a bit (for any savvy long term investor, who cares, but regular folk get scared any time they see red), election causing uncertainly, it is inevitable that people will look to sell their extra property, and also likely scare away half the buyers.

Substantial services are those that are primarily for your tenant’s convenience, such as regular cleaning, changing linen, or maid service.

(Source: Investopedia).As a former banker, we did these type of loans on a regular and routine basis.

Will she have to go through a regular eviction process?

In my regular market if I needed a new housekeeper I would have my choice because I have multiple properties and my properties keep my cleaners business than any other host.

I don't know about a regular citizen but as a licensed broker and property manager the state of Ohio requires us to keep all tenant security deposits in a non interest bearing trust account.