Nothing wrong with LTR's - but what I like most about STR's is you are (usually) operating in better appreciating submarkets. 

Most people don't know how to use a wood burning fireplace correctly - operating the damper, not closing the damper until the fire is completely out, going to sleep with the fire or coals still burning. 

Unfortunately, no one is "allowing" them to operate, @Stylianos Kalamaras.

This could include new appliances, energy-efficient windows, or custom finishes.Clean and Declutter: Ensure the property is clean and free of clutter.

My job every month is to operate with as little $ as possible in banks that pay nothing, getting every dollar possible into my money market accts earning 4%+.

As Charlie Monger once said: our operating assumption is that the USD is going towards zero. 

It's the lenders who usually require that the property is listed under an entity, depending on the state that they operate on.

She also mentioned that they’ve been in real estate since 2006 and have managed over 30 properties (though this is more of a side business for them), which suggests a mom-and-pop operation.

The properties we operate are all in Indiana. 

How about using SDIRAs not to hold assets but to operate businesses?