Dimensions are 14ft x 18ft with the long edge the side where LCR located but front right side has a 4.5 ft opening with no door (right of right speaker).
My gut was telling me the better option was one good sub with less compromise but wasn’t sure. Sounds like you’d agree.
Blew my amp but now using as excuse to do some upgrades. Borrowed my brothers Yamaha 3080 AVR and was pretty amazed at how good it sounded vs an older and smaller spare AVR I had so now have the itch.