Absolutely, we are all going through the same comments (or did!) at some point of another. My parents and sister were no board from the very beginning. They were the ones telling me not to listen to the others! My brother could not afford it, so he didn't go. Truth be told, I offered to pay for him, but he still couldn't 'afford to take the time off.' I was upset he couldn't be there only for the fact that we were prepared to foot the bill.
My fiance's family was more hesitant, and voiced their opinions more. I knew that one of the families really wanted to go, so I basically took their top dollar that they could afford... and found the resort and everything else based on their top dollar.
In the end it worked out fine, but I still wish we would have been somewhere nicer than the resort we ended up with.
Ironically, we are all planning on doing another trip in 2 years! HA! This time, I'm not planning! lol