I would strongly recommend NOT following the general advice of buying a cheap "3018" or something similar. Makera Z1 should be the baseline. Otherwise you're stepping into a world of frustration where you will spend most of your time trying to get your tool to work, rather than getting parts produced.
Unfortunately, reasonably precise and rigid mechanical assemblies do have to cost a certain amount of money.
Unfortunately, reasonably precise and rigid mechanical assemblies do have to cost a certain amount of money.