On the same project I've received quotes that were over 150% higher than what my current installer charges.

When I finish filling the last property I will be bumping close to 10k profit a month from them. ( after I pay off some credit card debt I used for my business) Since I have rolled most of my profit back into the business and doing rehabs etc I don’t have strong tax returns.

Wondering if any local investors use a Quickbooks certified advisor that doesn't charge an arm and a leg? 

You should ask for a copy of the vendor's invoice so you can see if the charge is legitimate.  

No money crypto, baseball cards, stamps, coins, skateboards, bikes. 

I would like to mail a letter or possibly a post card.

I get on site property management instead of 8-10% off the top (and some guys who I don’t use charge first month’s rent, yikes).

He might be a little higher than a Bank would charge in interest but I would consider Owner Financing is near the top of a good way to go. 

Research the max rates you can charge (usury), and laws about private lending in your State. 

In addition, my triplexes are right across the street from the high school, so there is a drug free zone charge as well.