its always cheaper if take parts off the car, drop them off to be painted also. a while back, (10 years ago) i dropped off a whole grill for my 97 GMC Truck, (used, wrong color) and had the lower door sills painted for 75 bucks. ( for 3 colors) they had the grill for 3 days, and the truck for 1/2 a day, took my grill and truck home swapped the new grill in. then i put diamond plate door sill protectors in.
you just need to shop around for time lines and prices. and whats best for you, as in can you loose the car for a week or not?
take the moldings off, drop them off, and you still have your car.
or take them off and give it a shot yourself.