... and mixing up epoxy isn't "a bit much"
Personally, if I staked my business on a proper repair, I would MUCH rather replace the bottom than mess around with epoxy unless it is something that can be easily epoxyed, would stay epoxied (without re-breaking in the same spot), and wouldn't show the repair.
Personally, I would quote one (1) hour labor knowing it might take up to 1.5 hours. <== i.e. I would probably quote $95 for the labor...
Too bad there isn't a labor bluebook for computer repair times.