The last thing I would recommend is to set up your real estate career in a way that puts the least amount of stress on it.

I agree with the advice given here, and I cannot stress ENOUGH how having strict screening in place/HIGH tenant standards will help you avoid this demographic.Also make sure you've set the rent accordingly for your Class A property. 

No way do I allow any events - primarily because of stress on a septic system, liability, permits required in my county, neighbor/noise impact.  

It has been expensive, and stressful, and scary , and overwhelming but extremely rewarding at the same time.

FHA loan, traditional House Hack financing.Earnest money: $10,000Used 3% Realtor Commission to contribute towards FHA down payment; cash due at closing: $1,200Rehab #1 was financed via a HELOC against House Hack #1 (purchased a SFR in Dec 2015)Materials were funded by multiple credit card accounts: a stressful way to do it...Rehab #2 including materials were ultimately reimbursed by HELOC against subject triplex, after Rehab #2 completion How did you add value to the deal?

That's the root cause of your stress.

The rehab alone has me stressing.

They’re fast and efficient, and I know without a doubt that I wouldn’t have to stress or worry a bit that everything is getting done correctly and quickly.However, I’m also fairly confident that he charges more compared to the typical “investor-friendly” contractor, as they do a lot of primary residences (typically for high-end homes) and commercial work, and I’d wonder if this would affect the rehab estimate too much (maybe not though?).

They’re fast and efficient, and I know without a doubt that I wouldn’t have to stress or worry a bit that everything is getting done correctly and quickly.However, I'm also fairly confident that he charges more compared to the typical "investor-friendly" contractor, as they do a lot of primary residences (typically for high-end homes) and commercial work, and I'd wonder if this would affect the rehab estimate too much (maybe not though?).

I was able to make the seller comfortable with what they would get after the sale, as far as money, and the lessening of stress in their day to day life.