Bob,
Thanks for the info, and I am American, and thanks to Uncle Sam, I'm over here for now and will be back to the US one of these years. In the meantime, I still pay American taxes, and am exept from the British ones except TV Tax, Road Tax, VAT on most purchases. It all falls under the SOFA, or Status Of Forces Agreement; not to be confused with the couch or coffee table. The SOFA is basically all the ROEs (Rules Of Engagement) whilst over here.
It seems to me the better way to do this is under the table as I will not be reporting it to the Incredible Rip-off Service and it's more of a hassle for the little I'd make. I'm really keen on nature pics, like landscape and seasonal pics like fall in the Northeast US where I'm from and surrounding area. I might try my luck, if I know of any friends that are gonna have a wedding sometime. In the meantime, I man be able to get some family pics if coworkers ask me. I'd be happy to do so. I get to use my 10D, and they get great pics. It is really a win-win situation. It ought to be interesting.
The only reason to diversify is to keep from getting bored taking the same pics all the time. It's like if all you ever do is planespotting, I recon after awhile it would get old, and would want to try another type of pic like landscape pics. I can say that chasing Concorde, other than being exhausting driving 2 1/2 hrs each way to Heathrow Int'l Airport and it was a rush, especially takeoffs. The noise it makes it unreal, but it is as aweinspiring watching it move thru the sky.
I guess honestly, I'm looking to recoup some of the investment I made and be able to continue to afford it, the end of the day. Another thought, least money to IRS; most money in my pocket. Too bad ONW doesn't exist anymore...that was a tax-free zone. That was cool for that reason! However Incirlik/Adana, Turkey isn't my idea of fun.