Opening a RC Related Hobby store
I agree with everything posted above, been there done that,
My rule #1 now, Don't turn your hobby into a business, it will ruin the hobby. It is so true! I know...
Overhead will kill you, your markups will be too high to compete and your market share will be too small.
If you must open a store you must do mailorder because you will need the volume, problem is the competition there is outragous already and you will have to give things away to sell them.
Open a craft shop instead they seem to do well....