The fee for home expansion is becoming harder to pay. I used to pay it in a single day by going to the island once or twice, alongside paying for a new thing for the town (I've built a bridge, demolished and rebuilt the original in a new place, built a campsite and a fountain. But now it's actually getting tough.
On a lighter note (or perhaps much darker), I found out today about Aika Village. It's incredibly intriguing, and I can't wait to get the Dream Suite so that I can go there myself. I have a few of my own theories regarding the lore. The creator really put a lot of effort into it.