Well said, Vsheetz. We would need to know.......how many lineal ft., not square footage of home. What kind of trim? There are literally hundreds of trim profiles out there. Is it wood, mdf, plastic? If it's wood, what kind of wood? Are you changing colors? Do you want primer and 2 coats of paint? Do you want it sprayed, rolled, or brushed? Do you want the trim removed, painted, and reapplied? So many variables.Welcome!
Questions like this cannot be well answered here due to the many unknown variables, to include local prevailing costs, etc. Best suggestion is to get at least three bids from local reputable service providers and go from there.