iminlove,
Immigration here is going to be far more concerned about whether he can support you (with all the appropriate documentation) than about what you make in the States. Look at it this way--what you make in the States, as a temp, isn't of interest to the government here as far as your ability to support yourself HERE goes.
But that aside, what lola wrote makes a lot of sense. Everyone here has felt that head-over-heels rush of love, when you think you know that living overseas will be a big deal, but don't care. But what she wrote was spot on: visiting here is a lot different from living here. Visiting here (and his visiting you in the States) is much like a prolonged vacation--you have the excitement of being in a new country, with a new love, and taking that all in. But once you get married, you need to be aware that the day-to-day mundane things in life in the UK are no different from those in the States--in other words, when you get over the infatuation phase of being in love, you'll have the same relationship realities--except you'll be thousands of miles away from the people you normally turn to for friendship, support, etc.
So please think this out carefully. You're on Cloud 9 right now, and that's a great feeling. But if you can, look at what you've written as an objective person (stranger) or even just partially objective person (good friend) would look at it, in other words, as if someone else wrote it: How would you advise you?
I'm not trying to be a downer, whatsoever. But you need to look at a couple of other practical angles. You're doing temp work in the States. If you haven't found a permanent job there, you're in for a big challenge here. Some of the people on here don't have jobs, but they're also bringing up children. But others either have no kids, or their kids have grown up and gone. And a lot of people in THAT position have asked me to look their resumes over, etc., and found it very hard to find a decent job here, period, much less one that pays well. In my case, I freelance, and I had set (and now continuing) clients in the States, so looking for a job here has never been an issue. But are you prepared to be 100 percent dependent on your husband (emotionally, financially, etc.? That's a bad position to be in with ANYone, much less with someone abroad.
Anyway, I just wanted to point out some things you should be acutely aware of before you make the big leap...
Suzanne
P.S. I'm usually the intuitive, completely impractical type. But every once in a while, I take a reality check/get a wakeup call.