Many years ago we did a "house exchange" with a guy who owned a sailboat charter company in the BVIs. He gave us a free trip on one of his boats and he would (evntually) come to use our house (he was from Toronto).
We got this C&C
36. Nothing ever worked. First day engine
wouldn't start at Norman Island, they came over from Nanny Cay and "fixed" it.
Next day it started, we sailed over the The Rhone, engine
wouldn't start. Called them up, they said "Can you said back to the base? I said "Sure, but have you looked out your window?" There was no wind
"OK," they said, "We'll be up with a replacement boat by 1500."
And they were: a 50 foot Beneteau
We had a lovely time.
The owner never did come to use our house.
Look, good stuff and bad stuff happens all the time.
Sorry to hear about your misadventures.
You have the right conclusions though.
Better luck next time.