We own and manage 3 ABNBs in Tampa and have not taken a formal course.

If you are buying in your own name, then obviously you won't have this as a formally separate entity.But the bookkeeping will be so much easier at tax time if you set up bank accounts for the rental property separate from accounts you use for your personal expenses.

Either way, you're going to want to make sure for both lending and your own records that your husband's company is submitting formal invoices on their letterhead for the work that has been completed for your draw requests. 

I am considering buying 1 acre of land in Austerlitz, NY Columbia County, on the MA border near the Berkshires.

I've been around for over 30 years and I have a formal credit background from 2 of the largest banks in the world.

But with completely open borders, I could be wrong. 

Bisbee's main industries are Tourism, Construction, and Border Patrol.

Port Richmond is also a solid area but you gotta stay south of Aramingo Ave, its a pretty hard border because once you go north of it your creeping towards zombie land. 

A written agreement is valid and need not be formalized by a deed.”* Some kind of joint venture or common interest development.

It should be cheap to split the parcel assuming the house borders a street, still relatively cheap if you have to grant street access.