To move or not to move.

well I have been offered an exchange, from our 3 bedroom very spacious flat in a pretty village, to a 3 bed house in a large town, near all the services my kids and I could access. problem is this takes me further away from older son, and he needs me within spitting distance to keep him on an even keel, even if he won't admit it. if he can't touch base with me his behaviour gets more and more manic, and moving would be 30 miles and 2 hours on 3 buses away....and that's when buses turn up on time! the younger two just don't like change. my daughter is willing to consider as she recognises she needs to get out and join some activities with people similar to herself. whereas my youngest son has flipped at the thought of change. for me, a garden, somewhere for me to stress relieve, access to support services so I can have time off, but a smaller property, smaller room sizes. I don't know what to do. the professionals are all for it but that's probably because if I live nearer services they don't need the support/time/effort they have to commit to at moment, not that they do help at all the moment anyhow. so to move or not to move a decision I need to make soon