Please also share any techniques or practices you may perform to help keep this most critical component of real estate investing under control.   

The evaluation of the neighborhood, correct After Repair Value, reasonable Rehab Costs, different funding options, the cost of the borrowed money, the monthly carrying costs affiliated with a rehab project, correct insurance requirements, protections in the closing process, aligning yourself with a title company that fully understands how an investor buys and sells houses, deciding to sell or rent the completed project, and the legal requirements of either.

It also has great info on other cost components you may or may not have thought of. 

Most of the work is for one side only.1 set smart lock -100paint front porch railing -385Pressure wash entire exterior -385scrape and paint soffits 24 side only -785scrape and paint window trim/ frames -610repair screen door -110repair deck to code (stairs rail) -685stain deck to code 550remove unused lockbox -15remove pile of firewood -85paint interior window trim/frames -485prime and paint cabinets to repair under sink -810run proper 220-595smokes x1 -35CO2x3 -135repair sink to be sturdy -85paint trim on stairwell -55toilet running-replace components -110paint door that has crayon marks -70repair and paint door to bed 1 -120repair door to bed 2 -120adjust both doors to close and latch -120repair utility room door -120filter sway and HVAC checkup -185

Who is your Realtor - if you can have them commit to find and place a good tenant in the rental at the rental rate that is in your analysis, you align incentives because they are not only helping with the purchase but kicking off for successful management. some Realtors do this without charging a leasing commission.

Pay close attention and align yourself with an experienced attorney when you build out your team.

Let the GC be the owner's rep that way his interests are aligned with yours.

IMO a responsible investor needs to aim to get leverage below 75% as quickly as possible, while getting property condition to a point where you would not have a home inspector ring the alarm bell over stuff failing left and right and major components being past their normal life expectation. 

I was just wondering if bigger pockets had a group that would Be aligned with bigger pockets members In my city...

So many components to it.