Ironically the hotdog cart was the least retarded idea (still retarded) he had.
as I remember, the Dog Shack was born of Doobie wanting to run a hotdog cart at U of A games being Reform is a straight shot down the highway to U of A, and running into the "your cart/food truck needs to be filled at a health department inspected commercial kitchen" problem.
I can't remember if he actually ran into the "Lol, fuck you scrub these people paid their bribes" or if he never made it that far and was about to. If you forget about the thousands he'd need to shell out to U of A to be allowed to operate, and Doob's general fucking up, (and assuming he found a non-retail source of dogs & buns) he could have probably gotten enough money during college football season to live off of.
The being closed on Independence day was also completely LOL as Doobie's Dog House was located fairly close to where Reform was hosting their fireworks display and it attracted a few thousand people as it was the show all the people from from the surrounding areas came to watch - he probably could have financed FRIES PILED HIGH for months if he'd been open or even better actually gotten his cart.
Costco, but yes.