That does sound like hard work and quite familiar, too. "it makes you question why you are spending money and annual leave days to be on 'holiday' ha." Yes, absolutely! I still want to go on holiday so I will carry on obsessively researching and planning to try and get it right. It's a tricky combination when you put so much effort into it but then have to try and have zero expectations.
About DD's school, I can understand why you'd feel disheartened by that conversation. What's the system like there; do you have the option to visit different settings and see which one might need DD's needs best? Is there the equivalent of SENDIASS to advise you?
We're not on holiday yet - Easter is early this year and our Easter holidays start on Good Friday, with 2 weeks off school after that. I'll be on annual leave from Thursday (school finishes early that day) and have next week off too. I'm working the second week of the holidays and have booked one day of holiday club for DS - I was pleasantly surprised that he seemed up for it (it's a "tech camp" and right up his street) but I know he'll get increasingly anxious as it approaches. Anyway, apart from that I am looking forward to it a bit more now; I've planned a couple of things to look forward to (even though we didn't manage to organise to visit my sibling abroad this time).