I got the first plants hooked up to autosell at the market. If there was anything else to do I couldn't figure it out. The next shop items were in the 1000s of gold which I didn't want to wait for.
Thanks for playing! Seems like I really have to rethink the whole shop UI since I actually meant the nut grinder to be the first device unlock, it costs only 30 coins and would speed up the revenue quite a bit. Makes no sense having it buried in there now that I think of it.