On their tax returns they had Line 44A blank, so essentially $0…but then later on they listed vehicle miles in a separate line item.

They're of course related, but actually separate.

One approach I am strongly considering is a house with a separate living area, mother in law (MIL) suite, additional dwelling unit (ADU), etc.

In the past, in larger operations, there was a separate manager over those activities.It depends, and it is complicated.

function of the soil... its just not anything the folks that sell these homes talk about.. why would they same with RE agents.. however if you take trip there and drive around and look at vintage homes that are 99% of your rental targets you will see the brick work in the corners separating or filler in it.. sometimes its just a few grand.. but other times its a major issue.. as your plumbing is in concrete foundations..

It will require a separate inspection and getting inspections can take up to 2 weeks, plus.Best of luck to you.

Im keeping personal funds and business funds separated.

If you can raise rents (given the strong demand) and/ or implement rubs (or put separate meters for the utilities) you could really increase the value to the property.  

And, that assumes self-management and separately billed utilities.Good luck!

I've heard that in Texas, the tenant security deposits have to be in a separate account.