Howdy f16! I am moving into a new home and it has room for a basement gym! I am thrilled about this as you can imagine. I've been waiting a long time and could use some advice from anyone who has done this before. The space is 10' X20'. I only have about 8' of clearance. I reckon it is still good enough for BJJ, for teaching my kids, drilling with a friend and some rolling maybe. Does that seem big enough to you? I am also looking for ideas about mat configuration, subflooring, etc. I have a line on some tatamis. Let's say I can get 10 in like-new condition for under $1K and that it's within my budget. The most I can get in that space is 9, in a configuration that is 18' X 9'. One thing I am concerned about is water and condensation. The basement is supposed to be dry, but in Nova Scotia there is almost no such thing as a dry basement and this is a 100 year old house. I was thinking of making a plywood subfloor on cubes of foam. I have seen videos online. I reckon this is easy to clean if need be and the cubes and subfloor will keep the mats up off any water on the floor. Anyone have experience with this?