I found this on the Campertrailers.org site for sale....I know it's only 9ft tent but has a swag of extra's and it's a Modcon. Looks like it's in pretty good nick, maybe worth a look. It's a little over your budget of $5K but remember all those added extras....
Kitchens can be very pricey depending on what you want and get. Mine is very basic and consists of a long rectangular box that has been attached to the draw bar. The top is the bench area and I have a plastic bowl for a sink which I attached a drainage hose to. Underneath is a shelving area which I put two plastic boxes to store kitchen crockery and other bits and pieces. It is covered by a curtain. It is basic but very useful.
Wish I had a decent photo of it. I have this cut and paste version so far. The microwave and 20Lwater bottle and cutlery/plasticware box all sit just inside the trailer. The blue curtain is the shelf area.
I'll try to find some better photos, not sure if I have any, though, but you get the idea.
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MacLister wrote:I can see my family members and I smacking knees and shins on this thing - a lot!
Nice, you know you can pull out the pin and keep that "tongue" in the car? So then you don't get hurt by it. If you have some kind of storage compartment in your vehicle stick it in there, not on the floor, because if you're in an accident it will kill you.