Assuming everything fits and that both frames have forks, a reasonable time estimate would be 60-90min to swap everything from one frame to the other. That assumes
no cable change/replace and that you have been nice and cleaned everything up snicker snack so it looks like new. Actually it could be done faster by a mechanic not even
going flat out, if you leave the bar tape alone. A bit of ride around time to do final adjustments would be in order. If the frames have internal cables it might slow things up a bit and if the cables or housings are to be replaced. Multiply by shoprates and add 50% should get you a
max figure. Now the shop types can chortle and snort. Steve