"The Home Darkroom" by Mark B. Fineman. My copy is the 7th printing of the second edition, October 79. ISBN 0-8174-0555-0. You especially want to read the last chapter - "A Mobile Darkroom" as it answers the question on how to move the enlarger around.
I'd be willing to bet the local public library (or uni library) will have it or can get it easily.