@Mark Sullivan if you are a buy and hold investor these loans work great.

If the cosigner is not contributing funds but is just helping secure the loan, whats a fair way to compensate them?

I would look at the DSCR loan as the first option.By the way, I suspect you are going to be disappointed by any refi appraisals   ADUs typically appraise poorly   JADUs can lower the property value Vs having the space as part of the primary unit.  

25 inspection, 25 closing, 1 loan.

HELOCs are not available because they are residential loans guaranteed by individuals and what you seek is a type of commercial loan or credit line which are available to seasoned companies with proven financial track record.

Many people choose NOT to have this, because the administrator will then vet every investment you make to ensure you do not invalidate your IRA.Invalidating your IRA means that you've done a prohibited transaction and the entire account is then deemed as distributed to you.If you don't want checkbook control, then I recommend a plan administrator such as Equity Trust - www.trustetc.comIf you are sure that you're aware of all the rules around prohibited transactions and disqualified people (who you can and can't do business with), then a plan administrator like Sense Financial would be a good place to start talking.  

Loan Amount: We specify this as a percent of the purchase price.

I imagine there is not much of a relationship with the turnkey service after the sale and I would deal with the PM and Loan company directly. 

Not only will lenders be effected, but borrower credit, business loans, inventory, and auto credit will suffer when those effected have to relocate, find long term replacement housing and their livelihoods and income are destroyed.

Great question: The seasoning period begins the day it's purchased.We do just shy of 100 DSCR loans per month.