What is your price point and are you looking for turn-key properties or something along the lines of a "fixer upper"?

Is it possible for her to buy the house/land then we subdivide the property (property has an approved preliminary plat for subdivision into 2-3 separate lots, electrical and pluming lines have been put in place for future development).

Mid-term is more likely to work in any market than STR, but I think you would be surprised at how well an STR could do if there are no other options like that in the area (think people's parents or friends coming in for the week(end)).I've seen a lot of people grimacing at the net-negative house hack (it's just a product of rates and low inventory in a lot of markets) and this is one option to try to recoup some of that loss.

Maybe down the line!

Those may not pay off.Buyers:  There is a fine line between the first mover and the last sucker. 

Building a relationship with local real estate attorneys or agents specializing in STRs in the area can save you headaches down the line. 

What type of loan products would be available for an LLC buying a house?

Anything along those lines.

Themselves.How do I find the investors to line up with my deals?)

If you're going to install it from under the house, get some line wire and make sure it doesn't fall out down the road....