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

No matter who it is, RAD or another group, please do a lot of research and make sure you are working with someone who has a track record and is able to connect you with references.

On top of that there was an $8,000 tax credit, as an incentive since people weren’t buying.  

I consulted with a real estate lawyer a few times this year who said it's very hard to sue for negligence and they advised against taking legal action, especially since the property manager at least followed through on the eviction and repairs.I've now asked the property management company to apply a $4k credit for all the challenges I've had working with them.

Pay your vehicle loan, credit cards, etc because in 12 months all of the accounts you pay out of a business checking account will be omitted from your DTI in the future. 

referral=UZXgWmHappy to help review settings or share unused property assessment credits if needed!

This is probably a place where you go to one of the personal loan sites to borrow money or maybe a credit union. 

Either way if you personally guaranteed the note, yes it will affect your personal credit no matter who the property is titled to.

I don't have the capital to replace the HVAC at this time or the credit to finance it.

I thought to take a look at their track record while watching their pitch fest and left.