For example in many jurisdictions I can STR units in a duplex but cannot STR an ADU (some jurisdictions will let you STR if you owner occupy).

Small details like a handrail on stairs or window locks can cause your unit to fail an inspection, delaying the start of rent payments.

Speaking of whic, rent is due on one of my units today, and I got to log in and check right now.Hope this helps.Leon

If you have a nice unit I would try to max it out if possible!

Wanted to know if landscaping is a tax deductable expense in general and if it differs when one unit is owner occupied.

Some hotels actually have a condo like structure, where people can own the units, but perhaps are limited on their personal use to only a certain amount of the year - the rest of the year it is in the rental pool managed by the hotel.If numerous room owners stopped paying their bills, you could get tax liens on numerous separately owned units.Hotels are a tough business, an issue I also see come up with them often is that they require refreshes, expensive and relatively often - at least once every 10 years, if not more often. 

Fast forward to today and I am financially free with in Painesville, Ohio a 27 unit, 24 unit, 21 unit, 20 unit 15 unit, 12 unit, 8 unit, and 6 unit.  

In fact, I’d like to turn the primary into a rental and then house hack in a multi-unit.

I think the unsuccessful and struggling units who have not jumped ship yet will continue to do so, leading to less supply, increasing demand, and a better year for the successful units. 

Meaning yep I know its a 20 unit building but they do not understand the structure of the investment.I agree on notes and tax liens.