Yes! My home set-up is 3" x 3" and 11 gauge, but considerably more modest otherwise than your all-Rogue (or mostly Rogue?) basis.
Either way,I gotta warn you jury-rigging a home gym can be (1) maddening, (2) satisfying, and (3) addictive. I've even sourced Amazon and Home Depot for stuff.
How soon before Mrs Flex demands her own upgrades on her half of your gym ???