you can't loop vent the washer
You can't wet vent the kitchen sink through the loop vent for the washer
You can't put a combo horizontally (the one that drains the washer)
You can't pipe the dishwasher without an air gap.
The washer has to drain into a 3" main.
in short you can't do much of anything there, and why 2" no hub?
I think it may be a good idea to call in a pro. Had you actually gone through with all that it never would have passed inspection and you would have to pay to do it all over again.