Like if I want to do a cosmetic flip on something in the 275k range, where I want to put in some of my own sweat equity in the place (I could demo and cut wood and paint) but then hiring some help for electrical, or plumbing, would that be a good experience to work directly with the folks?

3) Did you use Max engineered or residual method for cost segregation?

All electric boxes installed.  

I am a young electrical engineer that is excited to start investing into real estate.

Then electrical and plumbing together since they coordinate on panel location and rough-in paths.

Between a good specialty tax company that does engineering based studies, no cost consulting and your CPA/tax professional, you will save yourself a lot of time and brain damage. 

For a SFH STR, you're right to avoid the big firms — an engineered study from them typically runs $3k–$16k and just doesn't pencil on a single property.A few things worth knowing before you pick a provider:1.

They are really accommodating for investors and one of the owners (brothers) does the engineering report himself. (972) 740-2235

My name is Malcolm, I'm a recent college grad turned full time engineer. 

I am in contract on a four-plex and there is only one meter for electrical, gas and water.