There is also a horse barn and horse fields that could be rented out, a garage, and several small utility and storage sheds.

Lots of people are working on solving the storage issue and modernizing the grid, which will help.

I know I need to verify sewer/utilities, easements, setbacks, soil feasibility, floodplain, density, zoning, etc. but I am not sure if that list is 100% comprehensive of what I should verify?

There are also other potential revenue streams such as extra storage bays and coin laundry in the basement.

Having the units so close together, you can create economies of scale by sharing internet service, sharing laundry service area, sharing supply storage areas, and your cleaners should charge less to clean 2 units right next door to each other.  

The amount of leads is so low and the quality of them (for wholesaling) so bad that it is not a feasible business model unless you have hundreds of your "students" out there combing the listings for you. 

Say an investor has enough cash to buy a SFR outright and sell on an owner-financed note, either in a tax advantaged account or after holding for a year. They want to get all their cash out by selling a partial. How w...

City will not allow development of a home on the lot.Rent space to billboard company - Called 2 billboard companiesNOT ALLOWED - city does not allow any new billboards to be erected inside the city limits.Build multi-bay garage and rent each bay out for car storage NOT ALLOWED - local law prohibits erecting of secondary structures without a primary structure.Rent to seasonal businesses like flower tents, local farmer, etc.

Take that number and create a feasible plan with your wife.

In Wilmington as well, working with investor group that looks at SFRs, multis, self storage and MHPs.