@Cindy Joseph if you had hired us and this person contacted us for your property we would not approve them.

However, beyond that if they are honest in assessing themselves, they might choose to hire or partner with people who can fill the other roles needed such as a realtor, accountant, lawyer, etc.

You should hire a PM and buy as many properties as you can.$100k * 6% * 30 yrs = $574k$200k * 6% * 30 yrs =$1.1m$300k * 6% * 30 yrs = $1.7m

If its that hard to find comps, I would probably have them hire an appraiser because they can use less than ideal comps and better adjust for the differences and also have a methodology and rationale for how they chose the comps used and how they adjusted.

I hired a lawyer to get her evicted. 

Hire a property manager.If you choose to self-manage, be prepared to handle tenant comms, maintenance requests, and rent collection.

You can partner with an operator or hire a mentor to help you.Either way sounds like you have a good problem as most people struggle with raising capital so your already ahead of the game.

My mom is concerned and said she can hire a professional company to do more tests if necessary.

But when you hire a cheap laborer who says they are a " contractor " .

Also, I'm considering hiring a real estate agent, as they know the area well, and I'd appreciate their advice.