Brian, You can get a used food trailer for around 3-7,000 dollars, Of course you need more for better looking trailer but you can buy one cheap these days. Also you can get most of the coffee equipment for around 5- 7,000 dollars. That ofcouse depends on what you are getting. So, if you work on it yourself and make nice printed signs... You can get away with getting a trailer for around 15- 20,000 dollars... that means you have to have a truck to pull it with...
I have helped outfit one of the coffee trucks and it can cost over 100,000 dollars. That ofcourse depends on what type of truck you are getting.
Coffee Equipment Cost:
Espresso Machine(2 group)
And Grinder ---- 1,500 -2,500
Coffee Machine with
Satellite pot ----- 600- 800.
Ice Machine ---- 1,000 1,500
Coffee Grinder ----- 500
2 Frap Maker ---- 1,000 (new)
And other table and equipment... 2,000
This is all assuming trailer already has power, water, heat/air, some tables, counter and some of the equipment to do food business...
I think if you look around hard enough you can get a lot of things cheaper these days....