I can tell you that in my RVB it goes from 68K when you first open the editor then after running a live session it goes to 98K memory. But I also have kill streaks, guidable predator missile, a full weapon loadout UI with a preset editor and a bunch of other stuff. Stripped of all UIs and custom meshes, so basically just all weapons and the obstacle pieces you are looking at anywhere from about 50-70k with no spatial loading. If you can get all weapons and all the obstacle pieces for less though let me know how ;). You can probably combine a lot of repetitive pieces into one mesh since for example every obstacle course piece after the first piece placed is about 4 memory so if you had to make big walls and combined them into like a 6x6 then your 6x6 of floor pieces for example uses 4 memory vs 24 memory. A few hundred pieces at 4+ memory a piece starts adding up really really fast o.0.