Its possible to do a suit relatively quickly, but like others have said, its basically non stop work. My first suit, I used the
Normal Definition pieces and it took me a full month of work. I was working on it 8 hours a day at some point. I didn't take a break for an entire month. Looking back I don't really even know how I did it, haha
You could probably do an ODST build or Marine armor using foam, or even cardboard (take a look on the forums, a few folks have made some great builds with it) and do it decently quickly, depending on how motivated you are
Just mentioning from my own experience, you can build a suit quick if you want to, but I'll tell ya, if you really are invested in this hobby, you'll just end up remaking it down the road.
Its worth it though! You learn a lot each time you tackle a piece
