Good link Werby!

I would at least invest in a cheap cheap printer. I've seen them go for under $200 in some places. Use this printer to do two things.

1) Make parts for the bigger DIY build. This will save you money in the long run, as premade parts can add up. Plus, once you get your machine running the way you want, you could replace those initial parts with better ones. And then if you don't want the smaller machine, and it's still relatively new, you could recover a good bit of the cost in resale.

and 2) learn the basics of 3d printing. I'd hate to see a beautiful machine get built and then scrapped. You might get upset when your build isn't working the way you think it should, and you blame the machine, when in fact it was some simple setting that could have been changed in the software. Having a known standard will help you build your machine.