Where you took thar photo? Beautiful sea... And what's that black round thing on the right?
I'm on your same opinion, better spend more but be done than less and keep stacking expenses... It's true with products you can see them, judge yourself and read reviews, with works to be done it's different, you need to rely on your intuitions, usually I check the attitude and competency of the person... Honestly I never had much chances as I live in rent and other sorts big works, but like when I had to pick a plumber for a small job I went to the one that seemed more capable and of good attitude, he explained well the problem and how to sort it for good and how to avoid it to happen again... After the work (change a tube) he showed me the old tube and said he could have sorted the problem with a small fix but then sooner or later the tube would break, bringing more problems and other fixes, so he just changed it straight, spending more than the small fix but less than a future break
Long explainantion, i hope it's clear enough