What documents do they require, what credit scores do they allow, how do they verify previous rental history, etc.?

Ask local materials distributors which contractors pay their billing on time, and who order materials consistently.Go to some local REI meetups and ask for referrals.Look at local jobsite and take note of truck signage.Of course verify their licensing, here's a link https://lni.wa.gov/licensing-permits/contractors/hiring-a-co...

Had someone in mind who I thought would be great but he wants to add fees that I feel are unfair including $200 admin fee (on top of credit report fees) and mandatory 41.45 monthly for enrollment in their program which includes rental insurance and hvac filters, identity ins, and a few other little things.I've managed to keep costs pretty low for my tenants but realize I've been cheating myself. one is buying. 

highlight_post=6803139&page=1#simplified-forums__discussion__replies-containerI have no reason to alert you of this danger other than honestly trying to help you avoid the trap that the rest of us fell into.FOR YOUR OWN SAKE, DO NOT BELIEVE ANYTHING MARCO OR NORADA TELLS YOU UNLESS YOU SEE IT IN WRITING AND HAVE IT VERIFIED BY YOUR LAWYER. 

utilize the services of a top notch, experienced, track record verified mortgage broker to locate your best fit mortgage loan.  

This means 20-25% for a down payment, and it has to be your money that you're using (verifiably in an account that belongs to you).Though there are programs that lend up to 90/100 to first-time investors, those programs usually don't work in Maine due to the rural nature.

Most HMLs follow a trust but verify.

It works almost identical to a car loan.

He was sued by the state on various charges like telecommunications and identity fraud, but was slapped on the wrist.

@Ben Neds I can't verify or deny much of anything you posted - I do however live on Signal Mountain and there were tornados that came through here.