I'm no help. I was thinking about doing a short little cruise and nervous about the cost. DH was like kid(4) will only be little for a short bit of time and we will regret it in 20 years when she is grown if we do not go on this cruise now...let's just do the WBPC cruise and knock something off our bucket list...
...but then he added a 3 day pre-vacation with my mother in law in Miami...

...so he's not perfect. Ha!
My entire full time salary is used for vacations and "life upgrades"...so the cost really was not an issue for us. He has like 6 months of paid vacation time saved and I work from home...it all worked out. Im just cheap!
I hope you are able to convince him YOLO and go for it. (Oh dear, did I just YOLO? I swear I am not a kid)