But I have to share a time I wasted a whole weekend trying to "save money" since "I know electricity, I don't need no stinkin electrician".

It is highly unlikely you are underpaying for this work -- prehung doors are very much minimally-competent handyman work.

So the question is this... what typically does a rehabber look for in terms of relating cost of repair to profit. this house is 50k profit... just so I know what to sell the house for and stop wasting peoples time.

I want to be prepared and have everything tee'd up once I'm able to find a good deal, however I also want to be mindful of the lender's time and don't want them to feel like they've wasted time working with me if I'm not able to do anything until early next year. 

Bought the vehicle used, so I didn't waste money on a brand new car.  

I wasted a lot of money on different online lead generation tools, etc.

What a waste of time. 

The agent makes a commission (finally).It's invariably a minimal money game for the agents, a lot of work and hustle for very little return.How well does this describe your expectations?

You should also consult with your attorney on ways to minimize the risk of a Mechanics Lein going against the property (happens often if the General Contractor does not pay the subcontractors).

A few months ago, Hurricane Harvey hit Corpus Christi and caused minimal damage.