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

Depending on your credit, prepayment and LTV's.Rates are anywhere from 6.5%-8 % right now

Not in Texas.Quontic does not seem to offer these at the moment.Red Canoe Credit Union, WA ORRegionsRiver Bank & Trust, ALRivermark Credit Union, OR 90% LTVSCCU Florida 80% LTV, 2.75% first year promo, not LLC SECU NC 65% LTV rate 2.75% Oct 2021***Signature Federal Credit Union 80% LTV to 100% LTV (100% on primary residence).

If pre-payment penalties are a concern federal credit unions are not allowed to charge pre-payment penalties.

I've run into this on several occasions where the seller wanted to buy a new house and the old loan was still showing on their credit. 

Quote from @Lindsay Heller: College is a terrible investment except for a few specific fields.If he wants to invest in real estate, he'll need money, credit, and knowledge.

Another reason the large line of credit on another property would be better. 

Yes sir we just 100% refinanced...Used the same credit union who had the original debt. 

I have done a lot of googling and called a couple of local credit unions and have been hitting a snag when I inform them the property is owned by my LLC (both HELOC and Refi).Am I really down to hard money loans or business loans from the LLC itself?

When the market was a little hotter in the recent past, a lot of listing agents in my area would shun or downplay offers that came with financing from credit unions or "too big to fail" banks.