It sounds like you aren't renting your lot space/yard but instead own it, and your mobile home is in some kind of "common-interest community" (homeowners' association) rather than a mobile home park where you only rent the lot space from the park owner/management.
If that is the case, then your rights are determined by your community's governing documents and by NRS (Nevada Revised Statute) chapter 116.
It's important what your community governing documents say about this, and of course I have no idea what they say. You would need to obtain a complete copy and either read them yourself to see if they allow your management or executive board to do what they did, or give the governing documents to a lawyer to read for you.
As best I could tell from my speed-reading of NRS 116, NRS 116.310312 gives an executive board the right to perform maintenance and bill the unit owner if a foreclosure or a lawsuit to enforce a debt secured by the unit has been filed. Are you aware of anything like that going on?
I googled "Nevada legal aid" and three organizations came up. They are supposed to provide free or low-cost legal help for low-income people, so one of them might be able to help you. Here are links:
Nevada Legal Services
Legal Aid Center of Southern Nevada
Washoe Legal Services