Smart tech, such as fast Wi-Fi, streaming services, and keyless entry, consistently gets positive feedback, as do luxury bathroom additions like plush towels and rain showers.

That's just common sense.  

If you are buying in a LLC there is typically a loan agreement and personal guarantee that is common

This poses an additional challenge for new RE investors.  

I'll look into VRBO as an additional platform as well, thank you!

This home is not a luxury home so the insurance route seems overkill.2) Buy a worry free waiver and add it to the booking rate?

Its crucial that you know what the properties common rent is per month. 

Install additional stackable W/D units in the garage (requires some electrical work).2.

@Salome Ditmars In addition to what has already been shared on this thread, trusting the sponsor will be paramount to you sleeping at night, and I can't stress that enough.

I’ve used seller financing as both a buyer and a seller and it can make a lot of sense in certain circumstances (for example I used it as a buyer when I reached the maximum number of conventional loans I could get, and I’ve used it as a seller to both increase my net proceeds (due to collecting interest as “the bank” in addition to the sales proceeds) and to lessen my capital gains tax hit by spreading it out over a few years).