How good is a sub ?100 3d printer ?

[curious aardvark]

Why are you using things with supports ?

Guess it depends what you're printing.
In 6 years I've yet to design anything that needs supports :-)

Dual extrusion is iffy. to put it mildly lol.
Seriously consider a 2-into-1 nozzle setup. Once you've got two seperate nozzles you're just asking for trouble.

Autowhiz has a much better idea of boards than I do. I've got a mks sbase and a straight mks base.
I try and do as little messing about as possible, while he regularly rebuilds and upgrades all his machines :-)

Think about a 32 bit board that can run smoothieware. What i like about smoothieware is that you can easily change settings by droppig a text file on the sdcard and booting the board.
None of this buggering about arduino ide and having to compile every time.
Smoothieware also comes with really great instructions and manuals.

Actually one of the things I noticed at tct this year was a lot more hi-end boards.
basically the chinese are now trying to clone the duet - so there are a bunch of boards around that are both cheaper than the duet (what isn't) but still have most of it's features.