There are always unexpected things that happen with remodels, I have not heard of one flip that was finished on time and on budget.  

What you are saying is assuming that everything looks and good does not consider any vacancy, especially unexpected vacancy and that the future times are going to be perfect. 

We may occasionally fall down, take unexpected turns, or even at times take a few steps back, but no one ever said this journey will be easy. 

Always nice to fill the knowledge bank with random, unexpected occurrences.

That so that last $20k can serve as a cash reserve - for unexpected CAPEX items (although, speaking for turnkey, this shouldn't come up for the first several years), for flights out to vet partners, whatever.

My units are very small - under 600 square feet each - so not as many outlets, etc.

Expansion and contraction can cause overheating at connections between the wire and devices such as switches and outlets or at splices.

If you discharge to a drywell, you won't have a staining issue because the water outlet will be under ground.

The two things I'm concerned with is 1) am I going to like doing this and 2) what happens when there is a long vacancy/unexpected costs.Any input is appreciated.Thanks!

My issue is that the outlet that the AC unit plugs into is a 220v and the only AC units I could find that still ran on 220v were unnecessarily powerful (and expensive) for the units.