In an apartment building, the landlord is responsible for the HVAC unit(s), roof, water heaters, toilets, exterior of the building, windows, common areas, landscaping, etc.

You have installed low-flow, water-conserving faucets, showerheads, and toilets in your unit and the low-flow toilets were installed by a licensed plumber 3. 

Also, if the 2nd floor shower height and height above the toilet don't conform to ANSI standards, the appraiser may not count it as a bathroom.I have created additional living spaces in SFRs to rent out.  

In short, I would ask you if you want to be a landlord and fix toilets or you just want a cash flow secured by real estate?

Besides maybe installing better toilets and faucets I dont think I would be doing much to the units.

Another is, if there will be no working bathrooms during the rehab, that means you as the GC will need to provide portable toilet for yours subs.

T & I is $317, HOA is $339, so monthly cash flow is (-64) plus a couple hundred bucks a year if the toilet clogs or something.I feel like I'm letting the favorable tax treatment at sale and the low mortgage rate guide my decision to keep the property, since negative cash flow is never ideal for a rental - but I also love how low maintenance it is, and I can also see myself moving back into the unit one day if I ever get divorced or if my husband pre-deceases me.    

I'm sure they wouldn't appreciate you  knocking on their door at 2 am to do a toilet repair.  

New vanities/toilets/tubs in all units: $5,00011.

Installing a toilet pays $65.