Spindle ~$80, speed controller (Necessary) ~$35, power supply ~$70.
I keep trying spindles, I haven’t cut with the dw660 yet but it seems great for ~$55 plus $5.99 for a dimmer. Don’t remember off the top of my head but it’s around 600 watts. I have it mounted and everything but I can’t find any spare time yet. Another user has used his twice and says it is good and is running cool so far. I’ll post a video ASAP.
Depends on what you are cutting but I’d say anything under 300W is going to take a really long time to do anything but foam, or maybe PCB’s.
I am not an expert in this stuff, I just keep buying and trying, so you don’t have too.