I am back to this now. Various other projects and my son's friend found us a small sink on a construction site with a faucet. It's like a big bar sink maybe, 15" deep and 17" wide?
Aart, we butcher deer in the garage. They get ratcheted up on my kayak lifts and hung from the ceiling and broken down into meat lugs for later processing. My garage is detached and we do it in my truck bay, center one, and hose out the floor and the rubber mat I put under them.
The plan right now is to build new legs for the island top I acquired last year. I put old table legs on it to get through this last winter. I am going to use
these locking hinges for the folding legs for each side. One leg might be narrower than the other so it can fold inside the other legs.
The narrow legs will probably have these leaf/shelf support brackets installed on them to support and fold up platform for the sink. The table will be the same height as my kitchen island so it we want to expand that for crabs we can. We have 8 total bar stools.
The fold up sink shelf can be left down if we decide to use it as a table in the house and up if I want to drop the sink in it. I can stick the sink in the garage attic as I have a pull down stairs in it.
More to come as I actually build it. I'm sure they will be some mistakes and progresses to report.

The parts should arrive Friday, but Momma has me probably getting 2 yards of dirt to fix gardens and 7 yards of mulch this weekend.