I have 9 foot of counter and use every bit of it.
No slider though , just hinges and flop down counter / pantry door.
In this last picture I am not sure if you can make it out but there are 2 heavy duty 4" butt hinges mortised into the cabinet box and also the sidewall. The floor offers some support in the cantilevered out position. Since the extended cabinets hold up the weight of the hatch I use 2 screw jacks to assist the cabinets by transfering the hatch weight to the ground.
Storage is still a problem so I am down yet another path for a larger galley.
The Wishbone Wagon a mobile chuck wagon with 48 cubic feet of storage lockers and a 4' wide by 20" deep galley at the rear and 2 ~ 36" wing tables that will be installed outboard one right and one left. The build thread is in the tiny house section in my tiny barn on wheels thread.
