Right! Here's how you do it. Break it down, and start with the most achievable.
First: Start your own Ad agency - as you know the industry already, you just need a business plan to get you focussed. Once you've worked out how much you'll need to get start, beg borrow and steal the finance to get you off the starting blocks. In the meantime DJ as much as you can / clubs/parties/weddings even. Just get that second income coming in to help with your overheads.
Second: Demi God DJ Work like hell for 3/4 years at your ad agency and promote / bring in a management team to run the operational side of the business. While you keep one eye on the strategy. Sell your majority shareholding using the funds as your initial finance to open your own club. You now own your own club now, do what you do best and you're headlining everynight - DJ demigod status is in your grasp. 8)
Third: Villa in Tuscany After the next five years of hard grafting as a DJ - demi god and ad agancy non executive director. You sell your shares in both and retire just before your 40th birthday to a villa in Tuscany funded by the profits from sellijg your business.
Fifth: Booker Prize / Oscar winning screeplay: Loads of time to write novels / screeplays - and loads of material from your crazy 30's to inspire you!
Sixth: Woman of Dreams: Look, you've got a villa in Tuscany, an Oscar and a booker prize as well as a succesfull musical legacy - if you can't find her now you're beyond help.
Easy frickin peezy 8)