We have been around the bigger pockets community for over a decade now and have more 5 star reviews on bigger pockets than any company on this website in any industry (>270  5 Star reviews).

One potential mentor I had one phone call with and never contacted him again. 

These companies selling products tend to drain agents dry at these conventions selling every do dad that is supposed to give them an edge over everybody else.

Unless you had a foundation repair company you trust tell you needed a french drain.

I would get on the phone with a local lender through a local bank. 

Right now you say it is $400/mo but in the summer it is much less so you need an average. you can't gouge tenants or you'll get a phone call one day from a lawyer. 

Here's an article with things to consider when selecting a cost segregation company.

I have no personal experience with them but they are the only company I know of that are built more for self managers and small portfolios. 

This is our messages to Appfolio for the last two months, they are awful and holding our fund not to disburse, please see below - We have been trying to reach your company by chat, phone number and no luck.

A person who has spent his 2000 to 4000 minimum CPA practice hours doing foreign currency conversions at Deloitte for a Belgian energy company may not know the first thing about real estate or anything else.