Onit please go back to the original car plan. Let's have a think about what this lying cheating bastard has done. He gave up on your marriage without telling you so you didn't even have the chance to fight for it. He didn't fight for it. He took the easy, selfish LCB route of finding someone else. He was dishonest about that. He betrayed you and your DC to the point of actual NEGLECT when he failed to give a shit about your DS being in hospital and wanted to leave your DD AT HOME ALONE so he could get his disgusting end away with an alcoholic moral-vacuum tramp. Then when he finally admoitted to what he'd done HE BLAMED YOU AND THE FACT YOU'D BEEN SERIOUSLY ILL FOR HIS DISGUSTING BEHAVIOUR. He ditched you and your beautiful children for said alcoholic moral-vacuum tramp causing you all huge amounts of emotional distress and pain. You have had to move DC from big lovely home into small not as lovely (yet!) home and now you are downgrading the car for an ugly old piece of shit because you are too nice and good a person and want to be fair to this UTTER IRREDEEMABLE CUNT.
THIS^^^. Onit please return to the previous car plan, please. I know that it's such a headfuck to believe that the person that you thought had your best interests at heart DOES NOW NOT and IN FACT wants to rip you off as much as he possibly can. It's so so hard to come to terms with that FACT but please remember that so many of us have been here before you, and lived it and are out the other side thriving and have learnt from our mistakes.
As to what to say to him when he pushes for a meeting, "My lawyer says that's not appropriate", rinse and repeat when he tries to bully you, question you, etc etc. Remember HE CANNOT MAKE YOU meet with and talk to him, so just DON'T. Yes it's hard standing up for yourself but imagine us all standing behind you when you do it cos we are there in spirit if not physically. xx
Sorry for more shouting 