Hi Mattie,
Just be careful about what type of surface you are painting...A lot of manufactured homes have pre-finished drywall, usually vinyl covered...so a primer for walls and trim will be a must. Also, moldings are usually not standard size or placement so color "break outs" and transitions should be a matter of discussion with the homeowner.
Best of Luck
rmichael pro painter
PS.. Glad you got paid for the ceiling...Some folks are happy with the statement "Hey, That's what one coat Looks Like"..