If you don't know what phase 1 and phase 2 reports, ALTA surveys, lease estoppels, lien releases, etc are, then digging down the due diligence rabbit hole for a while could be a great option.  

Upgrade to a BP Pro membership and you can use RentRedi for free.

I haven't done a survey but the parcel map makes it appear as though the driveway belongs to the property to the left.

You could leave a short survey at your cabins to test out your ideas.You could also try word of mouth referrals, such as current guests who refer others would both receive $x off a future stay, or some other thank you gift.For group rental ideas, like scrapbooking, you could try to tap into related stores or events.

Another aspect missed is setting up the company initially to allow for different classes of membership.

My question is whether or not there is a way that my business partner and I can both utilize my Pro membership (aside from the obvious, they use my login), or is it strictly one Pro membership per person?

All the above plus form a community with webpages and cHarge membership fee6.

Your BP Pro membership gives you free access to Rent Redi.Else, try Buildium.

Rent Redi comes free with a BP Pro membership

Using AirDNA can be a better way to structure a DSCR loan since long term rent surveys often come in lower than expected which can be the deal impossible to do as the rent is too low on the survey to support the expenses.