We haven't regretted having DS tested, in fact it has opened some doors for him and helped us understand how to advocate for him. We found the information very useful and even decided to have DD tested as well.
Same here. But we had DS tested at 5.5-6.5yo, not 4yo. I think I'd prefer to wait if you can, just because I think it gives you more options for testing and a truer read of the child.
But if you need the numbers now, then I think you have to get them now. I'm with Cathy A that I think I'd start with less and add more if you need it, unless she's giving you a tremendous package deal on it all. You may not need so much, and there's no reason to pay for all that if you don't need it.
If you can manage it so that you can BOTH have him tested (perhaps to a lesser extent) AND go away for a little time alone with your DH, then that would be my vote! Never give up a weekend/week/month away if you don't absolutely have to!
