I live not far from where you are thinking of moving. I'm in Mechanicsville in the vicinity of the picturesque Chicahomminy swamp….Here are my thoughts. You could definitely be happy and make a life here but….
I don't think you can ever really "go home" again. You've changed, and it has changed around here too. The culture shock from returning "home"can be worse than the culture shock of moving to a completely new place. I lived in Europe for seven years and got the itch to "go home". It was great for a couple of months, then reality set in and I felt like a foreigner in my own country – a truly awful feeling, I can assure you. It took me years to adjust. That's something to look out for. You won't like the prevailing political and social mindset around here, and there isn't much folk music. There's plenty of bluegrass and country music, but no folk clubs in the sense that they have them in the UK.      
I don't think the job prospects are impossible, but I doubt it will be easy. There's still a lot of unemployment, and I know a lot of qualified people looking for jobs, and those in their fifties are having a hard time of it. The other thing to keep in mind is, even if you get a job and can get health care coverage for yourself and your husband, you're only a layoff away from losing that insurance for both of you. And given your ages and preexisting conditions, if you ever have to buy health insurance on the open market it'll be very, very expensive. I think under the new legislation (if the republicans don't succeed in getting it repealed) they can't deny coverage for preexisting conditions, but they can and do charge an arm and a leg. Another thing to check on , will your husband be eligible for Medicare when he's 65? It's almost impossible to get anything but Medicare supplements after age 65, so if he doesn't qualify for Medicare he could end up with no insurance, as a lot of companies drop coverage at that point, figuring that Medicare will take over.
When you are down and things are not going right, it's all too easy to fall into "the grass is greener" mentality, but this is definitely not the promised land. Frankly I've never seen things so polarized and unstable, and the economy is still weak.
I know you have some powerful reasons to want to move, chief among them being your daughter. You also would probably be able to afford a nice house here for what you'd sell your flat for in the UK, given the relative housing values, and it's a good time to buy right now. Plus as you know, Virginia is beautiful – beaches, mountains – it has it all. I've managed to have a fulfilling life here, and you could forge one to. But definitely try to get in a frame of mind where you're not looking at it with rose colored glasses, and weigh the pros and cons very carefully.

Have a look at this website - there is a forum that might be of help:
Dive Into America