I've debated just focusing on one or two areas of work like flooring and painting, and demo perhaps and then hiring out the rest of the work.

If you are going to hire someone, that number needs to go up a lot. $50 for repairs on a home built in 1964 seems way too low for me. 

Hired the wrong contractor to rehab, big mistake!

Try also, Patriot Title or Momentum Title.Keep in mind that if you ask the title company to hire the attorney to draft docs, that attorney does not represent you because you are not the client. 

I plan on hiring someone to look at properties for me, $50-$70 to walk through the property, takes videos and pictures for me.

We didn't pluck this number out of thin air. 

I engaged a licensed HVAC contractor to do my central air systems- I’ve been burnt in the past, so my code going forward, is to buy materials myself, and pay the labor upon completions or milestones- The issue with HVAC is suppliers will only sell to licensed contractors, not homeowners.  

You might need to start off with hiring a GC for a few projects and build a good business relationship so you know he does good work and he knows you pay and are serious. 

I like inexpensive 800-1200 ft2 2 bedroom/1 bath brick houses built post WWII with forced air furnaces, low slope and simple roof starting 15 ft off the ground, neat little chain-link yards.

And sure, hiring/contracting someone can impact your overall profit, but you may also find doing so can save you a lot of money and heartache by steering you away from the "money pits" and the "too good to be trues".