IIRC Robuilt talks about a campsite property in the Smokies that has taken years to get off the ground. 

The six tiny homes were build from the ground up to our specs.

It would be a long, painful, drawn-out learning experience for you, and unless you plan on specializing in assets like your duplex for the next 10-15 years to get your real estate investing career off the ground, I don't think it's worth it.I do speak from some experience here, Marlia.In 2017, I bought a duplex that was a converted from a big old single-family.I bought the duplex for $5000 at the county sheriff's sale.

I build from ground up or do heavy rehabs in the DMV area.

However, the very experienced and grounded investors can figure out cap rates and multiple other carefully assessed characteristics to come out ahead.

Let me know if you have any questions in regards to bridge, fix and flip, ground up construction and DSCR 

They meet at the Coffee Grounds - they are very nice people.  

With a .6% ROE and a current inflation rate of 3.3% year over year, you are losing ground unless the projected appreciation rate of your property is high enough to overcome these negative numbers.

This seems like a costly fix, as well as a rental safety concern- The basement leaks, the basement is below ground and built into a hill, and there is always stagnant water in certain spots of the basement floor regardless of amount of rain, which only makes it worse.

You may need to get those values from an expert in the field so you have good grounds for the value claimed on the deposit.