It is a lot of fun! There is one main player who holds the save file and others can join and live in cabins on the farm. The cabins can be upgraded just like the farmhouse and every player has their own inventory, skills, and money.
The only thing that sucks is that time never stops when multiple players are in the game. Idk if there is a workaround, but it makes days go by way too fast later on in the game when you have more daily tasks to do before heading to the mines/cavern. You really have to work as a team and assign responsibilities otherwise you don’t have time for any exploration