Thank you all for the responses,
After reading all of your posts and suggestions it has narrowed my focus on what I’ll be concentrating on.
 
Seems to be a consensus regarding rent/lease being the largest expense so it looks like I’ll be playing hardball with the leasing agent when/if the time comes. I think I’ve read somewhere that negotiating a favorable lease pretty much determines if your business will survive.
 
Overall sales is the next variable I’m concerned about. The theoretical $500 in sales per day comes out to aprx 1 customer (avg sale $5) every 5 min for an 8hr day (sounds reasonable but who knows?). I think I’ll play spy for a day and travel to my neighboring city hot dog joint and try to get a rough figure on how much they crank out in a couple of hours. Hopefully the numbers will look good and keep me motivated. 
 
Tasty Dog,
I’m sure this what not your intention but you got me spooked regarding selling more than hot dogs to hit sales goals. I would solely be depending on dogs as my anchor with chili-dogs, nachos, pretzels as additional “food” items.
 
The percentage/numbers break down are invaluable and I’ll be referring to them as I check and recheck my figures.
 
Thank you once again for the advice/guidance.
Stan dog