Some may not agree, but think I would rather avoid mixing different guest preferences and recommendations for future guests.

In future I would go with frameless shower stall doors if there's room & skip them completely on tubs.

I moved here from Florida after seeing the projected growth.

The reason we bought the property is that there is an 8-acre clearing at the peak of one hill which is where we planned to build the future homesite as it has an amazing view and a nice, mostly flat area (see second picture for a bit of the view).

Rental market there for LTRs is not robust however, so make sure you have vacancy money built in to your projections. 

Anyone know of good local (Lehigh Valley, PA area) banks and companies for landlord insurance, bank accounts, and future RE/investment support?

Youre in a fantastic spot of being aware of the benefits of real estate and planning ahead for your future.

SSM could be promising in the long run and despite its not so nice history, the future seems bright! 

Platforms out there let folks invest smaller amounts in real estate projects.

This is still a very tricky area for lenders as there are not many "industry-standard" tried and true rules - many DSCR Lenders and buyers of these loans are still wary of the SRO model - that being said, it is a lot easier and more flexible to underwrite on an acquisition if you are buying and the property could be utilized as a LTR / MTR or STR as that allows for a more tailored projection (as long as the property doesn't have unique or altered characteristics that would require it to be a SRO / MTR)