Hi, I'm one of those rare American in America people on the site. I'll put in my 2 cents and hope it helps.
Income and pricing of goods really varies across the country. DH makes an above average wage here, and my being a SAHM doesn't really inconvenience us, but will never be rich or anything like that. I guess we put a lot more away toward retirement than most people, too, though. If we were in many areas of the central part of the country or the south, we'd be pretty well off. However, if we were where Califrau is, or in a big metropolitan area like NY or Boston, I think we would be in for a big shock, and not in a good way. Different states have different kinds of taxes and tax rates (for instance here in Oregon we're one of the few states that doesn't have a sales tax, but we have really high property taxes, and gas taxes that are some of the highest in the nation) that would be a good thing to check out, too.
I googled Montgomery county PA statistics, and came up with some good websites. However I've been up and down 4 times from here with my kids and can't find them after closing them out. Try googling that. I did find that the median income there was $65,000, which seems to be about $20,000 higher than the rest of PA. I about choked on housing prices there. It looked like to get an equivalent to our house there it would be $100,000 LESS that what we are paying now. If you aren't in Philly proper, things are usually a bit cheaper in the suburbs. It has been about 12 years since I've been in PA, but it seemed really nice and fairly inexpensive compared to what I'm used to.
When we were thinking of moving before, I went on Yahoo groups, and found groups in the area we were thinking of moving to, and asked if I could join to find out about the area and what we were getting ourself into. People there were really helpful and friendly, and I was able to get a good idea of the ups and downs and what was expensive and inexpensive about the area. You might want to try that if you are having trouble. I also checked into moms groups in the area, and that was great, because most of them were SAHMs like me, and what they had to say and what was important to them was very important.
If your DH is getting health insurance through his employer, you will usually be limited to one or a few options they offer. Insurance is a big expense wherever you go, and what kinds of coverage, and how much employers contribute vary greatly even in the same industry. There are thousands upon thousands of different insurance plans here. Car insurance varies widely, too. If you don't have an expensive car, and it isn't considered a big risk and you don't drive it much, it isn't that much to afford 2 cars. We inherited a car this year, and have 3, and it isn't that much more than 2, because we hardly drive one at all. Like a lot of things, it is all about where you live, because car insurance is all about zip codes, and someone could have the exact same cars and drive the exact same miles in a different part of the country, and their rates could vary widely. It is a lot more to insure our cars where we are now then when we were in the middle of nowhere.
DH has been moved by his company across the state once, so I don't know how relevant it is, but basically they did everything in their power so that we weren't inconvenienced by the move. In terms of moving our belongings, we had a company pack, move and unpack in our new house. They paid our mortgage on our old house until we sold it, and if we hadn't sold our house in 6 months, they would have bought it at fair market value. We actually made a bit off the move, because they figured we wouldn't find a house right away, and added up how much it would cost to stay in a hotel for a few months and eat out, and gave us that as a lump sum. (We just lived with the in-laws for a few weeks and pocketed all but what we gave the in-laws for staying with them). They even paid the taxes on the money they gave us, because the IRS considers that taxable income. They had a person dedicated to corporate relocations, and they were always at our disposal to answer any questions or problems that came up.
Sorry for the book. Hopefully some of this rambling helps.