OP, it sounds like you have a number of serious issues which you and your DH need to sort out.
However, regardless of all the issues, including whether the OP has or has not procrastinated about moving (although she does mention places she has said she's prepared to live/things she's deemed necessary for her happiness and work), her DH was totally unreasonable to rent a house without consulting her first and then just expect her to move. Especially as they cannot afford to run both households. Even if they split he will still have financial obligations towards his DS- can he meet that as well as the rent on this family home?
Whether the area is nice or not is irrelevant. Sure, she should probably do a bit more research before totally writing it off, but he doesn't even appeared to have checked basics- such as do the local schools have places for his DS to attend? Which suggests he either rushed into it because he loved the house, got carried away and forgot to check out these things (irresponsible at best, selfish at worst), or he simply doesn't care if the other members of his family's needs are met.
I can understand the reluctance to move from a place you know, where you have friends and family and where your DS is in a school you are all happy with. Especially when you are going to move a place where you have no support network and worry you'll feel isolated, and don't know if you'll get your son into a decent school.
It ok to be reluctant to move because of your spouses job. I would be reluctant too. I might drag my heels as well, even if my relationship with DH was good. That said, if moving really was the only option I would do it. However, OP doesn't say whether this was the only job her DH could get, or one he chose to take, nor what their original plans were (i.e. was he going to commute, was he planning to try and get another job in NW but hasn't been able to, or was the plan always to move to the SE?).
All of that said, your main issue is your relationship with your DH is not on an even keel, so to speak. You have communication issues and you don't feel loved by your DH (and maybe he feels the same about you?). You don't even seem to like each other much- you can only put up with him 2 days a week and he doesn't seem to care much whether you come or not.
OP and her DH clearly also have different ideas about parenting. In my opinion OPs DH is being out of line to tell his wife off in front their son, even if he feels she's being OTT or if the reason is that he worries about not seeing DS enough and just wants to spoil him as a result. Children need consistency, not point scoring from their parents- if there's a difference of opinion parents need to thrash it out in private and not in front of their children. This would be a big problem for me too.
I think it's hard to know, but it sounds like both OP and her DH could be being unreasonable on a number of fronts. But on the house front, her DH has most definitely been unreasonable IMO.