I second pretty much everything Kristi said about waiting a bit. I know it's tempting to try and plan things out well ahead of time, but there's so many bigger things to sort out before you should even think about tying the knot (i.e. meeting face to face, visiting the UK, etc). You should definitely visit the UK at least a couple times before committing to living your life over here, since it'd be a huge waste of time and money and effort to move over only to absolutely hate the country, and you really can't experience it until you actually visit. And ultimately, you still have to live with your spouse once the visa is sorted, so you need to make sure it's someone you'd commit yourself to under more 'normal' circumstances (I use normal for lack of a better term) since you don't want to go through a divorce after six months because he's an ars***** and you didn't take the time to figure it out.
Also like Kristi said, it sounds from your other posts that you're stuck in a bind in the US financially at least. It's tempting to want to run away from it all and start a new life with the white knight Englishman, but if you don't take the time to think things through you could put yourself into an even bigger mess.
Without strong ties to the US (i.e. employment, schooling, etc) you run a huge risk of being bounced if you go to the UK to visit, even if he's willing to pay for everything. Your energy might be better spent looking for work, or trying to go back to school if that'd help your chances of finding work--there's plenty of vocational schools that are fairly reasonable financially that can help you get into fairly high-demand professions (especially healthcare). Once you have a job or schooling, then it'd be wise to consider visiting the UK, and even if everything with your Englishman falls out, at least you're on the road to sorting yourself out in the US, irregardless of your relationship.
And yeah, I'm fairly certain a judge wouldn't appreciate PVC in his or her courtroom. Nobody says you have to wear a white dress or anything, but dressing appropriately is best if you're doing it before a judge since he doesn't technically *have* to marry you, but lke Becca said, you can also find other people who are ordained to perform the ceremony who can sort you guys out. But I'd really emphasize spending more time getting to know each other first--have him come visit, try to sort your situation out in NJ, and then look to visiting the UK if possible. As it stands now you might very well not get past immigration in London, and you'd be sent back to NJ without being able to see him since they'd figure you'd just never leave the UK--you have no job or school or other things to keep you in the US.