A cautionary tale for you, OP, to tell your dh:
A few years ago, a vacation-home-owning relative (VHOR) offered his vacation home as a venue for a family party. We have had many family parties there as it's a nice location and the outdoor space is substantial. Another family member paid for the food, several others prepared the food, another bought the drinks, another decorated, several people brought lawn chairs, etc. The VHOR contributed nothing other than the space (which was fine, no one was expecting more).
To everyone's shock and with no advance notification, it turned out he had invited his work crew and everyone in the neighborhood to party. An additional 15-20 people showed up. It was very awkward and inconvenient, especially since these additions to the party planted themselves on the deck's built-in seating, isolating themselves and using up 15 seats, leaving quite a few family members without seating. Also, this expansion of the guest list put a severe strain on the food and drink, necessitating a quick (and expensive) run to the local deli for additional supplies (which VHOR did NOT pay for). To top it off, VHOR and his wife then spent almost the entire party socializing with their friends and ignoring the family. Finally, VHOR's parents had a word with their son and his attitude was that it was his house, so therefore it was his party and he could invite who ever he wanted. And if we didn't like, we didn't have to use his house again for family parties.
This was several years ago. The family has not used his house again for family parties and he is invited to, but no longer included in any family party planning.