Greatly increased lending capital by transitioning from a ‘blind pool” fund to a series LLC / syndication model where investors know the property lending deal before committing to any loan and can “pick and choose” whichever loans they do or do not want to participate in.  

Do a series with each focused on the different things you mentioned. 

Roku TV's for ease of use.

Just be the absolute best host you can be for the first year -- communicate clearly and quickly, make sure cleaning is top-notch, make sure all amenities work (hot tub is hot, TV remotes have batteries, etc. etc.)

Instead of wasting 20 hours a week on your phone or TV, work a part-time job to accelerate paying down the debt and saving. 

I think 100 Mbps or higher is sufficient for general computer use and tv streaming. 

You do not need a separate LLC for each property or a series LLC!

.- Bigger area rug. 9x12 for King, 8x10 for QueenBedroom 2- Change location of TV to across the bedBedroom 3- This bedroom needs an optimized layout-If it’ll fit, scrap the bunk bed and do 2 twin beds along window wall with a table in betweenBathroom 1 & 2- Wall mounted blow dryer- Wall mounted body wash. shampoo, conditioner dispenserPatio- Scrap mini golf for fire pit seating for 6- Install canopy shade- Better design for photo-op wallOverall, great property, great location.

Your fixed costs could be something like the following: $5k property tax, $2k insurance, $3k utility (including internet and TV), $2k landscaping (mowing, weeding), $2k or $3k maintenance (if you have a pool or hot tub). 

It's not just shorter-term downturns to be aware of, real estate just like the stock market can experience 10 year periods of no growth. https://fred.stlouisfed.org/series/csushpinsa