Be careful out there, learn about the risks of dealing with agents, only deal with registered agents. Some people have leases to locations, who sublet just for a profit, others may take your deposit and run, do your home work very carefully and take note of their Identities, otherwise you may end up signing your life away on a contract, that is not feasible. I know because i deal with these people too, when outsourcing space. "A fool and their money are soon parted" Learn how to assess what is a good location, believe me, it is not only about high traffic... think of the 4 P's.
http://www.netmba.com/marketing/mix/
Work out your break even point and have a proper business plan otherwise you may well be a little to inexperienced to deal with all the problems that may arise from a lack of knowledge.
I have seen several places this week, One with outrageous rents, because a businessman has realised after 4 months, and spending 20k on renovation in the local area, that he cannot sell 300 drinks every day, even in a high traffic area, So he's closed his business and is trying to rent out for double the average cost on a one year lease, So he can recover his own stupid losses.
The rent was 6k a month, he dropped to 4k and i still refused, because i know the area well, some poor sucker will get caught out!
Sharing the cost is also not a good idea, if one is selling products and the other one isn't....if they jump ship, you are left on your backside, if the contract is broken by one party. Be careful!