I'm thinking of buying a nailer. My wife would like molding where there is
none, and new molding where there is old. That adds up to a fair amount of
molding. After that I see only sporadic use.

So go with construction adhesive. Use an occasional finihing nail where
necessary until it sets up, or tape in place. The current new adhesives are a
remarkable lot and your total investment is less than five bucks. HTH

Joe