For now there is no decent, reliable lawyers to assist with the claim, class action or group action. Nova wants $1,500 just for sending a letter to knc. No client care policy, no tactics nothing. If someone has instructed them please share your experience. US attorney is for US citizens I presume. Perhaps they can issue there.
Wanting all that money up front is not a good sign, and is probably a waste of time and will be throwing good money after bad.
If he was confident of winning, he'd do it on a no-win no-fee basis, charge 10% if successful and make a few hundred thousand.