It would be pretty easy to build one, I thought about it as well. If I didn't find my SS, this is probably the route I would have taken.
There is also a guy building a clone for almost half the price. I haven't seen his machine in person, but it certainly didn't look nearly as polished as the SS when I checked it out on his website many months ago. Although, the price and the product may have changed since then. I want to say the name of it was something like "Timber Wolf" and I believe he's located in VT or possibly NH. It's at least worth checking out if you want a similar machine w/o the hefty price tag.
Keep an eye out for used machines as well, I saw (and missed) two others before I got mine. This was over a 6 month period. One, in RI, was electric and went for $400, and the other, in NH, was gas and went for $800. They have been making these for a long time, but I don't think they've made any significant changes in the design over the years. Because the design is pretty simple, there isn't much to wear or break on them so don't be concerned about the age of the machine should you find an older used machine.
I have one cord of oak left to split next weekend, you're welcome to come over and do the splitting and check out how the SS is built if you'd like. I'm in Clinton.