Barn Raising ot Grow Neighborhoods

We've got a really active neighborhood but have members (mainly friends and relatives) who want to join and have no slots. Would love to be able to have a barn raising to grow the neighborhood by lots of five the same we can upgrade silos/barns,etc. Make it so any neighbor can contribute building materials to the neighborhood growth "fund". You could tie it to the neighborhood building with a "donation" button for contributions. Maybe make it so you could store enough items for the maximum number of upgrades, but let the leaders control the rate of growth.

There are plus's and minuses to growing the neighborhoods (more people to share but more people to share with) so i'm guessing at some point they'd be self limiting anyway, but you could initially set a cap of say 40 members.

Would also love to be able to surf neighbors the same way i can with friends from stall to stall without having to click out.