Wow, you are a patient and understanding woman. How else could you possibly continue to call this glorified handyman a "tech"?
20 years experience...and he still apparently can't operate complicated equipment like a measuring tape...and forgets the paint chip...and wants $1200 to put a coat of paint on a small room.
Personally, the first time he had used that "doing this for 20 years line" I would have asked him why all that experience didn't equate to doing it right the first time.