Re: Aluminum toe rail leak?
The good news is that mechanical fasteners CAN be repaired. As opposed to a glued joint, which is "forever" and has to be cut and pried apart.
The cost will vary with your local labor costs. It ain't rocket science, just a long job requiring some contortion and an apprentice on deck, to go down the side of a boat and unbolt every fastener. Then follow the joint with a prybar to open it up, clean it out, apply new butyl tape or whatever was used before (or a sealant if "forever" sounds good and you don't mind never being able to make a repair again) and then bolt it all back up again. I'd unbolt and clean on Day One, and come back to caulk/tape/reassemble on Day Two. Actually, before Day One yo might want to take a good look, clear away obstructions, make sure you'll have the right tools, socket extensions, deep thinwall sockets, whatever your boat will require.
From a boatyard? Well, two guys, two or three days, that's 4-6 days or 32-48 hours of labor at yard rates, which can be $50-150 per hour. Three grand give or take a grand maybe? Easy enough to ask them.