4 kitchens on 2 floors, system with only dry vents, can it be improved with wet vents ?

[tarlax]

I have 4 kitchens in a 2 storey building, each floor has two kitchen with a shared / common wall in which I want to run the drains and vents.

The diagram below shows what I'm planning to do:

each floor has it's own separate horizontal branch that drains 2 sinks and 2 clothes washer to the stack.

Could it be done using less pipes, using wet venting ?