Not sure why you need a long main court to have good cross courts - there can be empty space at the ends (at least if you have the hoops hanging from the ceiling).

(I watched my sons middle school team play over the weekend at a HS that used to be a college so it has the college length court- quite an uptick for the boys, who play most tof their games on courts shorter than 80' - they were very tired after a double-header....)