Walmart sell a Regulated 2000watt Hyundai for $500 here in Canada . Ive been using one for the last two years with no problems.
It's the 62db low noise type with Eco mode so it runs a slow as possible for the given charge rate.
I charge anywhere from 10 - 15 amps, charge time 20-30 min
(and yes my gene is usually at the front of the truck also )