Sure it is possible. The scale of the machine may limit its usefulness but it is a machine no more different than a router or milling machine. As to Average what does that really mean?
Nope and nope. As for cost search the net.has anyone built a diy one before? Also how much do the commercial ones cost?
You would be on your own. Further presses require a bit of thought when it comes to user safety. Again not impossible for a DIY machine.are there even commercial programs available to us that would operate a metal sintering machine?