I have had DACA since 2012 and to be honest it seems like good proof of residence, how old are you? specially if you are young, you don't need proof of every single month, just the fact you attended school should be more than enough. btw this is a pretty straight forward application and there is so much help everywhere and if all you have left is finding proof of those summers, then it would be pointless to get a lawyer, save yourself the 1000 they usually charge, and maybe go on vacation!