Business Plans

I’m attempting to put together a business plan for a taxi service. There is competition in my local area for such a service. What is the best way to “gauge the market”? I will need a source of capital for this venture and I want to be as thorough as possible when drawing up my plan. I think I have a good idea (this will not be your run of the mill taxi service) but I want to be smart about assessing the feasibility of the business model. How can I figure potential earnings or the demand for this service oriented business?

In my class we’re writing business plan ideas and in stuck on what to write.

Some of my hobbies are that i love to travel, go shopping, watch movies, listen to music, i love beach scenarios, and am committed to my religion.

It could be a simple shop,store, or service… but i want it to be unique and different.
So far i have an idea of some sort of variety store, or a religious store

THANKS SOO MUCH!
…oh and what should i name it?