I would stop work until an itemized scope of work and cost to completion is established.

Mine may be different though because I am still responsible for HVAC and many other large items on the property.

After adding those four items back in, it brings the complex to making around $6,500.

Due to item 1, adding an ADU can require years to start achieving any return (once the accumulated cash flow recovers the initial negative position).4) Adding an ADU is a slow process.

A PMC is great to use not only for all these items but also really being a trusted source for vendors too etc. 

A large ticket item could eat up the cash flow for years out.  

I only buy the Aquasource Henshaw White Watersense Elongated Height 2-Piece Toilet from Lowe's (item number 98923 model # T802).

Install cameras and exterior lighting on timers, place no trespassing signs, and place items that indicate occupancy - like a BIG dog bowl near the front door, shoes, etc. 

For example if you were to exit a new build in 5 years there may be no cap ex cost (i can think of few cap ex items that does not last 5 years - maybe carpet in class c and lower), just maintenance costs which would be fairly small.Best wishes

Items such as this that could be easily replaced by almost any LL at a very minimal cost, will turn into a $135 aggravation at best if you overlook it!