So... NO... most NJ residents cannot buy suppressors.
There are however many of you that I know own vacation homes and properties out of state, like in PA. You may actually be able to own suppressors.
Was having this discussion with my local purveyor of fine arms and evil items, @FreedomSportsLLC.
If you own a place outside of NJ, where suppressors are legal, you are likely able to purchase one with proper documentation.
The big caveat is though, you can only keep them and shoot them in PA. Obviously illegal in NJ.
Have you done any research into the cost and licensing requirements to run a repeater? We own some mountainous acreage in a very rural part of Virginia RIdge and Valley country that serves as vacation place and potential SHTF retreat. We get mediocre cell phone coverage (US Cellular only) and nothing else. I have thought of putting an antenna tower up the hill a ways (we own nearly to the top of the ridge. I wouldn't do it just for Ham or GMRS radio, but if I could get expanded cell coverage, and/or satellite internet (Dish or Starlink) as well, from one tower, I might go for it.
==== sorry, didn't intend to hijack the thread ====