I’ve had this tenon cutter attachment for years, just started using it. I just cut down an old wild plum tree and am going to make a garden chair out of plum wood. Fun! I got this from Lee Valley, a great source of carpentry tools.
I recently got the Makita drill — not battery driven, but with cord — from Jackson’s Hardware in San Rafael. It would have been cheaper from Amazon, but at Jackson’s, I get expert human advice. I use Amazon a lot, but also skirt them often. There are other factors to consider when buying stuff other than what’s cheapest.