I have $100k in cash to utilize to buy a long term rental property.

Does the 60% the condo-hotel takes include the HOA fees or utilities or replacement of furniture/repairs to the unit like plumbing or stuff like towels and sheets etc?

A standalone ADU is almost always going to cost more than doing an addition, so the value added or cash flow increases will have to justify each.I work with a team of investors who will buy SFR homes then build a new ADU on the lot and add a separate drive way and meters for utilities in North Texas. 

Since your friend covers utilities, this offsets some of your cost.

No, there simply utilizing it, adoption, as is all there competitors, so it's not any business innovation except the ai creators, it's industry adoption to a evolved S.O.P.. 

You find the house completely trashed with missing appliances and cabinets, tenants were cooking meth, windows broken, etc. 6-8 months of unpaid rent, unpaid utilities, thousands to empty the abandoned property and trash, $50,000 to completely renovate the property and make it rentable again, plus all the time, energy, and stress along the way.I would actually argue this is pretty common and not even the worst-case scenario. 

However, if you want to flip you may be able to make irregular chunks of income quicker that can make up the difference.Which leads me to the utilization of your equity.

So as long as your insurance, property taxes, property management, utilities maintenance, repairs, vacancy, and capex come to $4/mo or less you’ll be fine.

The property cash flows at a 15% ROI…………………..before insurance, debt service, utilities, management, vacancies, repairs, maintenance, payroll and property taxes7.

.: Quote from @Mark Cruse: Not sure why suggesting a person utilize an off-market strategy is bad.