Replace ten feet of rotted trim
About three hours, plus the lumber.
Asheville, North Carolina
Service
Trim shows every shortcut. I cut it to the wall you actually have, not the wall the drawing promised.
I replace rotted casing and baseboard, re-nail loose trim, fit crown in a single room and build simple shelves and cabinets-in-a-nook. I'm a finish carpenter by training, so joints, reveals and caulk lines are what I care about most.
Replace rotted or damaged casing and baseboard
Re-fasten loose trim and fill the nail holes
Fit a shelf or a small built-in to an odd wall
Cope and fit crown molding in one room
Prime and paint the new wood to match

What changes the time
Old trim profiles aren't at the lumberyard. I can match some by planing stock, and I'll tell you when a match isn't possible.
New trim over a leak rots again. I look for the cause first, and I fix only what I can reach and see.
I prime and paint new wood. A whole room of repainting is a painter's job and a different price.
Sample jobs
About three hours, plus the lumber.
About two hours.
About three hours, plus the wood.
About six hours, plus the molding.
I confirm the hours from your photo before I book.
Where I stop
Questions
Sometimes. If it's a common profile I buy it. If it isn't, I may plane stock to match one piece, and I'll say what it costs before I start.
I prime and paint what I install. Painting a whole room or the outside of the house is a different job.
Carefully. If paint in a house built before 1978 would be disturbed past the EPA's small-job limit, I stop and tell you who to call.
I'll answer with the hours I expect and whether I'm the right person for it.