Trust me; mine's anything but fancy; heck, it ain't even plumb. I just built a 8'x10' platform about 18" off the ground and put four walls, three windows, and a door on it, with a tin roof. It's functional, barely. I built it big enough for two, but mostly use it alone.
If you decide you want a crossbow, you might want to look into the Excalibur. They're a bit pricier than some, but they're the only one on the market with recurve limbs, as opposed to wheels and cams. The advantage is that you can change the string in the field if need be, instead of having to take it to a shop to have a cable or cams and wheels replaced.