Ok as far as VA disability and CS goes. I do not know how a judge in CA will rule for you. I can tell you how a judge in WV rules for my DH. His VA disability pay/ yours is not to for pain and suffering but is supposed to make up for what your disability is imparing your ability to work. So 20%, 30% heck even 10%. So with that your income should be less because the VA says you cant preform what you USED to be able to. So what the judge does to my DH is she imputes his income at a min wage job then adds his VA on top. This really sucks so its like he is making a really decent wage. THEN another thing we get hit on is there is a few dollars on his disability check for every dependent. My children to the VA are his dependents. To the CS judge they are not, so the few dollars that he gets for his step children are considered income to the judge there.
I again am not sure about CA others that know that state will be better than myself. Here if a parent spends less than a certain percentage of over nights with the child it has bearing on the Child support amounts.
I am going to assume that you are going through Voc rehab if you have VA disability. Well you are getting money for that if you are. So they will consider that money income along with your disability money.