Don’t buy anything you can’t afford. Sounds like you already got that part right. :)
If so good 3D-printer are lower cost than ever. Sure you could pick up an used Ender 3 and the like for $50 and put in the elbow grease to learn like it was done in the old days. Alternative is spending $200 on an BambuLab A1 and skip most of the learning curve.
If you can handle frustration than a cheapo used printer could be a good option. Please ask before purchasing as not every $50 printer is a good deal/option and as a newbie you can’t distinguish the good from the bad.
JLC3DP
Interesting 3D printer design.
Using 3 linear rails to mount the bed. I suppose each linear carriage is one “corner”/point and all three of them to define a plane without overconstraining the buildplate but you keep all of the rigidity of the linear rails?
The issue I see is that the three linear rails in one plane are overconstrained so it is still is a pain to setup (especially on an ender 3 like frame construction).
What is the reasoning for using two motors instead of one powerful in the middle?
For me it feels the polar opposite (ify ou mean with consumer space prebuild 3d-printer it would be a low):
None of this will be at FormNext this year as it is a business. It isn’t an enthusiast/hobby convention like RMRRF. Maybe in three years, it could be in the first commercial consumer 1machines.