Elarev, you are a good mother and you have a good daughter who needs your help. Unfortunately, a mother must often risk everything and happily walk into a hundred war zones just to protect her children from all the selfishness and callousness in this world.
In this case, you shouldn't have to bend over backwards (logistically or financially) when the obvious solution is so easily within reach. Right now, your spouse is your sole obstacle. Many here blame him and rightly so. That's because he does not need his children's permission to help your child and to do something that makes you happy.
If he can't acknowledge that, then you very well may have to 'bare your teeth' so to speak in order for that to happen. Going forward, he may find the wrath of his children far more preferable than having to incur yours!