I consider the $318 I paid for the unit cheap insurance. I have the Progressive Industries 50A hardwire unit. If you are going to be on a seasonal site and hooked up all the time, I'd go for the hardwire unit over a portable personally, you don't need portability. I went hard wired because it's one less thing to drag in and out when setting up.
2013 F350 dually
2015 Palomino Puma 351THSS Premier Edition
2015 Nights camped 15
2016 Nights camped 5