Research...target market .. prices to charge etc..
Training.. there are loads its a personal thing i suppose .. you'll find if you buy your gear new you'll get some hands training free....there are associations like NCCA & TACCA.. just google them and see their websites
A good few K for the right kit & equipment
Marketting....more marketting.....and more again....its all about marketting...
You have your window customers.. start there to guage interest... like all things though you got to do it right IMO.. otherwise punters wont come back to you,,,