I couldn't let this one go without a comment:
As a past editor/publisher/owner of an Ontario, Canada outdoors magazine I can tell you that minimal start-up costs are $1.5M (in Canada anyway) - logistics (field editors, regional reps, sales, travel for content, etc.) on top of that - advertising is what keeps you afloat, not subscription numbers, that doesn't cover costs - as a publisher you will and are bound to take any and all advertising dollars that come your way - if you don't your competition will.
In short, it takes a bottomless set of pockets to keep a magazine afloat. It is a gamble for the fist 5 years and odds are 65/35 you won't make it and even more in this present economy.
There are a lot of great ideas out there but without the bankroll to back it up, they never get off the ground.
It is said that the most expensive real estate in the world is the graveyard - that's where many ideas that could have cured cancer, diabetes, world peace, etc. have been buried and ideas that could have made trillions of dollars.
It's great to dream though.