Can't say anything about the printer because I have no experience with it, but regarding the 3D Refiner..While they develop that you could consider acetone vapor smoothing. Looks to give the same results with a very simple set-up. You can look it up on YouTube. (Personally I wouldn't want to run an electric motor that close to solvent fumes. I hope those 3D Refiner guys don't blow themselves up.)

I don't think you'd want to even think about making your own filament until you master making your own prints. When you see how many variables are in play to get good results, you'll understand why the filament sold on the market is from very specific plastic formulations. The idea that you can grind up your used milk bottles and extrude quality filament will have to be proven to me. Quality filament manufacturers don't even use reground ABS to make their filament.