Yep, its $15 USD and totally worth imo, Its been a week and i have 78 hours into it.
I think the only achievement I won't get is the Joja one, fuck that place.
I probably will on a different save once I've completed everything on this save.
I need to catch one more fish and I've caught every fish in game, waiting for fall. I have two things left to ship to complete the shipment collection. Basically, I'm just farming to cook and go into the Skull Cavern now. I'm sure there are still plenty of easter eggs to be found throughout the game. But I've done most of the primary story line. I'm married. Sebastian just asked if I wanted a kid (said yes). I've built everything possible except the slime hutch.
Found another exploit @Aria @Chappy @Honchkrow.
Listed in spoiler below and added to first post.
May have been patched (I dunno if my game has been updated).