And the hardest part of all this is finding sufficient labor to rehab/manage the property. 

Note origination where the borrower owns multiple properties with little or no debt, needs a loan for an acquisition, but can’t produce proof of income sufficient to get institutional financing.  

We've sent out a cohost request and most hosts are asking ~22%, which is higher than what ABB suggests - but seems to be in line with what traditional local prop management places charge.My question: Long term obviously it makes sense to learn to do this all myself and be self sufficient.   

My pre conceived notion was that 80 was sufficient @Tyler Garza With respect to DSCR loans, the LTV is only one factor that lenders consider when underwriting a loan.

Lenders typically require a resume for the GC involved in the borrower's project to assess their qualifications.When it comes to a GC getting funding for their own projects, while some lenders will take your experience as a GC or builder into consideration, most primarily look at your track record as a borrower on title when determining approval and pricing.That said, if a lender deems your experience sufficient, they may allow you to act as the primary GC on your own project instead of requiring you to hire a more experienced GC. 

So, if the co-signer owns real estate that is usually sufficient.

There are good relations with the neighbor so this likely wouldn't be terribly difficult to pull off, but I haven't ever developed a property from scratch so I would definitely like the opportunity to partner with someone on this to help ensure the success but first I want to finish the smaller property to have sufficient funding available if it is needed.

I know this is a personal liability/risk question, but I'd like to focus more on usual policies and prior cases if this would be sufficient to most?

You need sufficient NET (after all expenses) self-employment income from something like contract (1099) work, being a Realtor, wholesaling and so on.

Do some research on whether a single-member LLC (or LLC with spouse) will even be sufficient to protect you.