I have the ability to get these units built at very favorable costs and there are no real comps I can find so I am at a loss for planning my development strategy with regards to the size of loan I could reasonably get.This will be my first project and my partner's third but he self-financed the two others.

When you have thin skin, your foundation is not strong.

I built a large property management company about 10 years ago. 

It was built in 2021; purchase price 615; was planning downpayment of 25% or possibly 30% if rates better.  

Are you sure its a true log home and isn't just a stick built home with log siding and tongue and groove on the inside? 

These were originally built for students, but with population growth outpacing student numbers, they converted and are now thriving as traditional multi-family units.

They've had the property since it was built in 2006.

You can check out Kate's house foundation, and also NARR standards for sober houses.

I already had the spreadsheets built out fairly well and asked the coder to fill in the gaps I couldn’t figure out.

You could also consider seller financing, where you work out a deal with the sellers to pay off the remaining mortgage balance while securing the deed.All these options would help you avoid the risks of not holding title to the properties while also giving you access to the equity you've built.