Been playing this one and writing about it: no farming and no animals, including not buying anything (except backpack upgrades) from Pierre, no mixed seeds and other free seeds allowed either.
Been very different and more relaxed in a sense, since I don't have the extra stress of planing seeds and taking care of plants most days, with day 1-2 of a new season being especially hectic. But sadly also found out that this restriction means it's impossible to finish the CC (without going Joja route), and Ginger Island is also therefore locked out permanently.
Sadly I seem to have overplayed the game now, and find myself wandering around with nothing to do really. It's all just a grind, whether you have this or that restriction. But it was fun to play like this for a while, and particularly the early game is very different, with much more reliance on fishing. If I try something similar again, maybe will have to allow mixed seeds and maybe even wild seeds, as that may allow the CC to be completed (not sure actually). However, a playstyle like this was very fitting for the Riverlands farm, and I didn't find it restricting or difficult at all.