pretty sure that is not possible, if it is it would probably be really bad, but there may be a way to make the spells level as you do
Not really. It's very likely possible. And a modder-made spell crafting system may probably be better and more comprehensive than an official one(if Bethesda ever wants to make one).
Just look at Battlehorn Castle and compare it to other castle mods on tesnexus. Of course I mean the better ones, not everyone of them.
But at this stage without the CK making a spell crafting system may be too complicated. As soon as the CK is released, I guess nothing is impossible(assuming the CK this time is as completed as the GECK or CS).