Tape Op should be printing a DIY plate reverb project sometime in the future. The plate itself should run about 4' x 6', not including whatever housing or such. Welding will be required, but not necessarily soldering, and it's supposed to borrow other gear for some of the gain functions. If your good at DIY electronics, you could probably rig good dedicated stuff. It's not going to be like having Abbey Road to record in, but better than lots of verb in a box stuff.
Bear