I've done this on one house in order to cut costs - since then, I've added a meter with the utility company but it's a good workaround for the short term. 

How much did the rehab cost and how long did it take to complete?

The challenge with unsafe areas is (1) potentially higher cost of maintenance such as broken windows, etc. and (2) this is by no means meant to be discriminatory but anecdotally from people I've spoken to the challenging tenants tend to be at the lower price points.

.: Quote from @Cameron Moore: Another example: the average roof in DFW is replaced every 6 years and the average cost is $40k.

Cost vs.

At this time I manage and renovate majority of all my units to keep cost low but most likely not the best use of my time although I'm skilled at it.

You can start to educate yourself on the individual components; how much does it cost to paint on a per sqft basis or what is an average kitchen remodel.  

Planning to sell my property in vegas, just wanted a second opinion on if these are typical, fair costs in today's market.

Sometimes the closing costs from the auction are HIGHER than expected.

If I were to purchase an Airstream to use as lodging while I travel across the US to my rental properties, make repairs, and perform lease turnovers, would I be able to not only deduct fuel and campground costs but also depreciate the purchase price across 5 years?