Dos anyone have a suggestion for a cheap tablet to use these apps?

I don't have one and I am lost as to what to do with my sons dysgraphia. Insurance will not cover OT and we had to pull him from school and are homeschooling him.

I would like for him to learn to form letters correctly and also to learn to type.

I wonder... is it really bad is he continues to write letters from the bottom up?? For his whole life? I haven't started doing much writing with him yet, because I don't know how to go about it and I don't want to reinforce bad habits.
He has started some gifted classes at Northwestern and it is obviously affecting his ability to participate already.

For the record, his school didn't recognize the problem. The also didn't recognize that he is hg. They were not teaching him anything at all. Sadly. He is in first grade