Its not too difficult.

Quote from @Bret Hudson: Do NOT do business with Deal Machine or their affiliates.

What should it cost?

I do shy away from small cheap houses - 3/1 or 2/1 in bad areas or that are on a pier and beam type foundation.

A mentor ship program is how most people do it.

Now, I have multiple LLCs which each do a tax return. 

We do recommend screwing a lockbox to the side of the house and putting a key in it as an emergency backup.You can use Turbo Tenant or ShowDigs to get agent showings.Maintenance while vacant will be challenging.

I'm not sure if that would bring in enough money but it would certainly make things easier financially speaking while you built up your real estate portfolio. 

It sits on their credit report and potentially prevents them from qualifying for a rental or a loan.

It sounds like at the current moment a HELOC would be the way to go as it can help keep costs low by only paying interest on what I pull out rather than doing a refi and being locked in to a higher payment regardless whether or not I find a deal.