Rick Boman wrote: It maybe sacreligious, but using half lump crabmeat and half surimi(imitation crab meat) might be a more cost effetctive option. Just don't overdo the fillers.
It sounds like the crab cakes idea is out the window, but along the lines of what Rick recommended, there are also different types of canned crab meat at different prices (I believe jumbo lump, lump, claw???), with jumbo being the most expensive, on down the line. For some preparations, like bisque with whole crab in it, you're generally stuck going with mostly jumbo lump, as the lesser levels don't stay together, but for crab cakes I'd think you'd be fine going with a mix. I would think a mix of roughly 20% jumbo lump, 40% lump, 20% claw (or whatever the lowest level is), and 20% imitation (which actually has a good amount of flavor) would work very well and be much more cost effective.
Still, cooking 60 crabcakes in a galley kitchen in under 2 hours AT the location of the party sounds frightening, cost notwithstanding.