That is what I would be offering to people.

Genrally a fully delegated bank with correct licensing can offer the approval. 

This seems like a no brainer but would love some additional input from more experienced investors.

For additional context, the property contains two renovated log cabins with various amenities, hiking trails, and a few outbuildings.

It seems like now the differentiator is offering a place larger, and nicer than a hotel - motel room.  

This is where most ADU additions have issues. 

As soon a the "we found mold" card gets played, you immediately offer them to vacate with no penalty to insure their safety. 

One often overlooked item for those who invest in Ohio is not filing the locality returns.Ohio is a unique state where they require locality returns to be filed in addition to the state return.

I just finished a project in Torrance, CA, and I found that California has a lot of additional requirements related to energy code and seismic design.Construction: it helps to get a contractor involved early in the design process.

Additionally, it's beneficial to have before and after photos if available.