What type of comfort-ability are you looking for?
Are we talking jags and benz's, Lamborghini's, hummers (h1) or are we talking Lexus, mustangs, and hummers (h2/h3)?
You talking 250-350,000 houses, or are we talking 750-2.5million dollar houses?
If you can learn as much as you possibly can, get certifications, and train other people, then you will garner a large portion of income, especially when you become a world renown trainer or even a great local trainer. Either of these will garner you great income, just one a lot more than the other.
Besides that, there are other ways from which you can bring in a lot of money just by using your knowledge of nutrition, and exercise philosophy.
I have a buddy, which I havent talk to in a couple of years, but he is a trainer in miami, and now helps to work with the dolphins on the off season training sessions. Now, he writes blogs, using his exercise/nutrition knowledge, and makes crazy money selling ad space on his blogs...i've never read his blogs but he has mentioned it to me on a few occasions... I think his blogs get hits in the 6,000 range per day...
The fact is, there are many "niches" to making money with bodybuilding, but not just the actual physical part of bodybuilding.