hi toshi! i'm a personal friend with tanker builder and fermis. i've heard much about you from TB.
you can always find space to build. i'm a truck driver and have been building in the sleeper quarters for years(when i have time)!!! i use a folding "tv" table about 18 by 20 inches. sure, the sprues are scattered about my bunk, paint bottles and what-nots on the deck, but it works.
i've heard much about you from TB(i visit the FSM site when i can), you can't throw the towel in because of space limitations, there's always a way. hang in there!!