i am probably commenting on ancient, resolved issues by now but i read the first half of this thread with fascination (i have a meeting now so nca't read anymore) and thought i'd offer up some of my opinions:
1. a trailer can be really cool. in fact, here in london there is an infamous chocolate trailer - Choco Star - actually it's really an old ice cream van - that travels around dispensing all amazingly delicious chocolately things (brownies, cakes, hot choc) etc, and is run by a chocolate maker who used to work with Pierre Marcolini. This van moves around all the time and looks like it could sell awful soft serve with stale flakes stuck in it, but it's become a legend, turning up randomly at farmer's markets, etc, and it's a business idea that's really worked. a permanent trailer for burgers has no less great potential.
2. looking at the menu you posted a while back, i think it is too much. why not just be simple and amazing? e.g. a burger, a cheeseburger, a mushroom/veggie burger, a chicken sandwich. there's something for everyone there and it cuts down the prep that you have to do. same with the shakes - choc, vanilla and maybe you could have one flavour that always changes?
3. i have a suggestion with the fries - i think beef tallow is the way to go, but also, perhaps you could be creative in seasonings? for example, nandos has a peri peri dry seasoning that it shakes on its chips and which elevates them to something wondrous, i've seen similar uses of dried oregano. you could offer double-fried french fries, and have some seasonings that you make up yourself that people could sprinkle on them if they like.
4. you could name your burger joint after your son.
Edited by gingerbeer, 06 March 2009 - 07:24 AM.