So i want to create a Presentation Tray for my Ogre, as well as my new army. What do you guys consider is a good size for such things? Its for a 2250 pts army (since its what we usually play).

For my new army (Dark elves), there will be 2-3 little house, and a beach. I want to have enough room to be able to place a few extras, so i need room between blocks.

I was thinking something alongs the line of 24"x20", but i'm not sure if its big enough.