It sounded like you were looking for something smaller so I did not mention it.

SEP-IRAs or SIMPLE IRAs), donor advised funds, or research & development if you're building out any software to run your business.Just some things to think about outside of the realm of real estate. 

An LLC is just something you paid 150 dollars on legal zoom to create.

Since we're investing out of state (out of country), and it's our first deal, we were looking for something that didn't require much work up front.

I don't want to purchase more properties—we bought the one in NH to move to when my husband retires, which is a ways off—but I know I'd like to do something related.

If something similar would be required, might start having some effect on the structure value as you near the end of lease.  

You will get a 1099int from the borrower, or maybe you will not, but it is still just interest income.Don't worry about depreciation or other profit that you COULD HAVE gotten by doing something else, because you are not doing that, you are lending money.

If someone had 1,000 acres in Southern California and created something similar, I would invest in that in a second.

Is there something achievable in the area looking for any advice?

Between Linkedin, FB, Youtube, Instagram, etc....you should find something, though.