Awesome idea to use those bricks! For those fortunate enough to have a Michael's craft store or Hobby Lobby (which I believe also carry them), sign up for their online email coupons. Every other week or so they email out a 40% off coupon. Wait for that, and buy them using the coupon. Or if you need two, print two and take a friend along to get the other one!
I've started on a 1930s Orient pulp project, with international archeologists, secret societies, angry locals and such all hunting for or protecting mystical, religious objects of rumored magical properties. I definitely want to do some tomb interiors, and I like the way you did your modular layout. I am assuming that each module has a doorway at the same point so you can mix and match?
Mike Demana