He's already bought the tronxy :-)

The sidewinder has a few design issues - too much like a creality machine for my liking.
Also reviews are quite mixed. Usually more Indicative of manufacturing inconsistencies than any major issue witht he machines.

Anyway - yes there are several ways to add multi material capability.

You can go the prusa route and get a mumu: https://www.prusa3d.com/original-pru...-material-2-0/

This has an added advantage in that Autowhiz alreadu has one and you could pester him with lots of questions :-)

The other and slightly more expensive, but - in my opinion - much more elegant solution is the palette 2: https://www.mosaicmfg.com/