ablemable - we did less than 2 years ago & i would be happy to give answers to any qs you may have.
things to consider are
'top right' corner of US is expensive to live in - as expensive (or more) as the SE of england, so go online & look at housing prices.
schooling varies hugely, and can fluctuate wildly from town to town. e.g. detroit currently has NO money - they're shutting schools & talking of bulldozing part of the city as they just can't sustain it. we live 40 mins away & have fantastic schools, far better than the state school dd was in in the UK. find out about schools where you'd be & be prepared for 3 x private fees.
find out what kind of visa your dh would be on - some would limit what you could do hugely (i was on one where i couldn't even do volunteer work), and some make it impossible for you to apply for green cards (the right to stay & work indefinitely). it is v worth while finding out those details as they can make a huge difference long term.
relocation may look good, but there's a limit to how much your dh can receive without being hit with a big tax bill.
how often has his co done this? my dh works for a small firm & they helped, but just didn't know their way around the system. friends of ours came over with Ford, who have a relocation officer, so helped them out loads.
remember, you will effectively be starting over again with EVERY aspect of adult life - you'll have no credit rating, so hard to get a mortgage, or even bank account. no idea how heating/plumbing etc works so every single thing you need to do for the house/car etc is learning again from scratch etc. i often tell people that me being in charge of a house is scarily like leaving a 14 year old home alone - in theory, fine, but with only a very hazy idea of what to do if there's a problem.
don't underestimate the emotional side - we never lived close to either set of family, but there's something about not being ABLE to get home that makes it so much harder to cope with. also, US families seem to spend more time together as families, so weekends you are very mucha unit on your own.
assume that you will lose 10% of your current capital - bringing money over costs, and you will have to go through all those 'start up' costs of house finding, cars, driving licences again in one go. even if you keep your UK house & rent, there are agency fees & mortgages cost more (if you can get them) on buy-to-lets.
on paper, our US living style is massively better than if we were in the UK, but i still go through months when i sob almost constantly, even as i tell myself that we're better of (in almost every way) here than in the UK. it took dd (then aged 5) at least a year to stop crying to go back home & she does still miss friends & family.
BUT we do go on fantastic 'vacations' and have a lovely lifestyle. It is a big adventure & we were v much stuck in a rut before we moved here. dh wants to stay here permanently, i am not so sure - i like the idea of a few more years before we go 'home'. however, the uk feels less like home each time we visit, so who knows.
one thing i do know - i am NOT prepared to do this again in a hurry. it took at least a year to feel that we were sorted out, so you not working for a while could be a good thing.