It's coming back by popular demand! The Bell Tree World Championship! After three years, our grand gaming event will return on May 18th with ten Nintendo Switch games to play, both competitively and casually. Signups for the event are now open as explained in the new Bell Tree World Championship 2024 thread!
That really depends how far you want to push it. So far I'm close to fully upgraded house, lots of public works projects and spending money on main street. I would estimate so far in the game I've spent almost 10 million bells.
If you wanted to you could probably make 1 million bells a day by farming rare beetles on the Island. That would be about 3 nighttime trips depending on if you have rich town or not. That would be an annual income of 365,000,000 bells, good thing there is no income tax in Animal Crossing!