It wasn't a lot of standing water and the spots were dry, but I would've accepted a simple "We don't know" in response from the agent/seller.I also wanted to know an estimate of the age of the roof and water heater.

However, using a HELOC to finance your next property will probably be easier (if you're buying another "project") and cheaper (you'll likely get a lower interest rate). 

Has anyone used Unsecured Credit Lines or Cards on a Recent Project with success?

Would be a killer time to unload any problematic properties, vacant rentals, or list projects that will be finished within forty-five days. 

You can increase your cap rate through big value add projects.

I’ve got some projects going on both side of the bay so we should be able to meet up soon.

Based on the numbers you have shared it sounds like a very high risk project without much upside.

I'm 47 right now and I've projected all mortgages to be paid off in 13 years not considering rent increases. 

For one agreed upon price, the builder will buy the land, prepare the land, build the house, insure the project themselves, and then once finished, turn the house over to me once I've paid off the balance.The question for anyone out there with some experience doing this in MN, which builders offer the best value and are the most reliable?

They want to engage with people that are ready to start (and pay) for a project.