That could be new shimming or sanding/cutting some thickness off the door.

There are tons out there with great methods on how to figure out how many jack studs are needed and how thick a header needs to be.

At which point if the flip was thick enough, i wouldn't have any issue coughing up a higher incentive to play along.Very unique business model, almost could function like a builder..

I am always using the newer thick loose lay vinyl flooring an many of my flips in the bathrooms and kitchen.

The original tape came off the edges of the ceiling when we removed the old drywall so we won't need to sand it, but my husband said if it hadn't done that, we'd need to sand it down so the tape would stick to it and not be too thick.So, in short, I'd sand down the adjacent walls so the tape will stick and not be too thick, and then butt the new drywall up to the ceiling so the popcorn isn't disturbed.

I'm talking inch thick mounds of spackle  in multiple areas/rooms.

Thickness can vary too which drives price.Last but not least, check the Floor and Decor prices in your area to confirm you're paying a fair price.  

Don't let the Gurus fool you, it takes work, thick skin and a never give up attitude.

Being a buy and hold investor takes thick skin, I'm learning that everyday.

This depends on stud spacing and  gyp thickness.