Hello puppet,
As millercarbon stated, I also agree that you will attain the best bass quality utilizing 4 subs, even in a small room. In fact, 4 subs will actually make your room seem larger and you’ll also notice improvements in the sound stage imaging and size.
I know of another Audiogon member, hleeid, who had a small office with very limited floor space for 4 subs. He purchased the Audio Kinesis Swarm 4-sub bass system and the AK owner, Duke Lejeune, detailed how to locate one of the four subs on the floor and the other three subs off the floor supported on shelves. Each sub is relatively small and light, at 12”x14.5”x28” and 40 lbs,with a 10” aluminum long-throw woofer in each sub. They have a rated bass extension down to 20 Hz +/- 3 dB. The price is about $3K, including the 1,000 w class AB amp/control unit to power all 4 subs. I’d suggest you call or email Duke to discuss. Or, you could pm hleeid and ask him about it first.
Tim