I have gone through a nasty divorce. I am the "primary guardian", as my ex and I have joint custody. Here in lies the problem. He doesn't/hasn't seen the kid's on the court ordered visitation schedule, nor has he paid child support. In fact he has moved to 3 different states in the last 6 months and hasn't had a "job" since 2008. How long do I have to wait to file for child abandonment in NV. And is it something I could feesibly do myself. Thanks for your help.

At the top of many forums here are Read First sticky notes which answer frequently asked questions. Did you not see this one:
https://www.askmehelpdesk.com/family-law/child-abandonment-read-first-364259.html

Please read that first and if you still have specific questions feel free to ask.