Yes coastwatch and regionals can be good jobs once you get in. The problem is getting the experience to be able to get to the interview.
If you're single it's easily done, if you're taking wife and kids it becomes very difficult. You will have to figure out how you're are going to get somewhere near 1000 hours multi engine command.
Also worth noting there is very little expansion in the industry at the moment as a result jobs will be harder to get and the hour requirements will seem onerous.
Also worth pointing out that one day reality bites. All well and good living the dream but you have a family to support working shiftwork will wear out eventually. Aviation is not 9-5 and you are going to miss family stuff and things are going to difficult and you may have to be away. This is then compounded if you are struggling on the financial side if the costs of living keep getting out of control. The days of living in the country working for a regional are pretty much over. The cost of living in most RFDS bases are outrageous. Darwin is expensive. Most other people in these places will be getting paid twice your salary.
Everyone who I ever met who has said they only wanted to work in GA has either ended up in a major airline or quit. One guy ended up in the RFDS in his hometown but doesn't like the organisation because it has changed.
Mining charter may also be a sustainable avenue to pursue as a career.