Any referrals or recommendations for good and qualified brokers, sellers, property management companies, loan brokers, insurance brokers, mortgage brokers, contractors, etc.

Weather differs depending on where properties are located and even snow accumulation within the same geographic area will vary year to year.

My company is licensed in 31 states for owner occupied loans (check my profile) and I can lend in 45 states for business purposes loans (nonQM and dscr loans).

Total profit less closing costs and commissions will be about 42,500 each or 85k total.I would for sure get a construction loan, may be worth approaching 2 or 3 different banks and getting separate construction loans from different banks. 

They simply do Fannie, Freddie, FHA, VA, and USDA loans.

The Norris Group has a hard money ADU loan, but it's short term (3 years). 

You have a decent loan on the place that you won't be able to replace from a cashflow standpoint.So keep at it. 

A turn-key provider would be a company that can handle everything from sending you deals that fit what you're looking for, assist in getting you pre-approved for a loan, rehab (if needed), management, and maintenance. 

The seller was willing to take a secondary position on other property assets and provide a 3yr 4% interest on his loan.

Private lenders or even creating a small syndicate with a group of investors might also be worth exploring, especially since you can point to your uncle’s track record and your own experience managing rentals as a selling point.If timing is tight, you could look into a bridge loan to secure the property while figuring out a more permanent solution.