I made 60 million from selling turnips last summer, but I stopped buying them once the school year started since I no longer had time to sell them, nor space to store them.
I have no idea, I haven't really kept track! I used to sink all the Bells that I earned into PWPs and my debt to Nook, but I've now started saving them for buying things, getting the ABD... I think I'm around 525k, since I haven't started saving for a long time.
I think I have around 8 million at the moment. Wanting to spend it on some PWPs once Bree moves out (her house is in the spot I want to place a Sphinx) and once I get more requests from my villagers! I made that money from selling Hamlet, beetle/shark farming, and selling some items and hybrids on the Re-Tail board here. I should really try getting into turnips.