This could take a while to fix / replace. A stock tank with all fish rock etc would be better than splitting the fish up into multiple tanks and having to deal with ammonia in un-cycled tanks. Toss on a hob filter, power head or two and your good to go for however long you need. Light if you have coral.
EDIT : sorry I just saw funds are a concern.
If they were to share the live rock among the tanks, the nitrifying bacteria on those rocks will process the ammonia.