I'm doing a lot of research to try and open up a cafe in my local neighborhood. The neighborhood is located in St. Louis and is a lot like a small town of its own within the city. People in it are very friendly and everybody knows everybody in the neighborhood. I think a cafe would be a fantastic fit, because there is a diverse demographic of families, elderly couples, and young students in the area. The problem I'm having is trying to find a basis for forecasting and calculating sales for my business plan. The location is within the city so there is a lot of people in the area. In addition the building I want is within the neighborhood, and not on any major city street. However, it is also located next to a high volume restaurant that is very popular in the St. Louis area, so we can generate a lot of traffic from the local businesses, as well as from the neighborhood itself. There is also a church and a small grade school right down the street from it. The city zoo and major city park are also very close as well. Were going to be offering food like baked goods, pastries, breakfast, and possibly even ice cream and desserts. So my question is... where do I begin? I'm on a limited budget, and I'm also a do it yourself kind of person, so i don't want to hire a marketing/start-up company to do this work for me. I used the U.S. government interactive census map and found that there's about 4000 people aged 20-50 within the immediate area. I've also created an online marketing survey to try and measure demand in the area. Ive gotten only about 90 responses with about 50% of them living within 3 miles of the neighborhood. Unfortunately I cannot post the link to it on this post to get suggestions from you all. 
I figure average sale will be around $3-4 per customer visit. Do you think that is high? The tricky part is estimating the number of visits per day. How does one go about estimating this? Any help would be greatly appreciated.
Yours truly,
Future Coffee Connoisseur
Cobby

I figure average sale will be around $3-4 per customer visit. Do you think that is high? The tricky part is estimating the number of visits per day. How does one go about estimating this? Any help would be greatly appreciated.
Yours truly,
Future Coffee Connoisseur
Cobby