Cobblebot 3D Printer

[chbrules]

They're now saying that they're looking at making the frame entirely out of metal (upgrade option for $299 backers). I'm in it for the $799 package for the 20"x20"x20" w/ heat bed and enclosure, and the metal frame is a free upgrade if they manage it. They've also printed a 7.3" ^3 box with it (pic on their KS).

Am I basically setting myself up to lose $800 here? :/ I'd like to get out of this while I still have time if need be. I'm a first-timer. Can someone suggest a good path for me to go about this? I'm familiar with programming and some EE.