Spend $14 at a CAT scale before $500 on a hitch or $40k+ on a new vehicle! Find out exactly where you stand with respect to all your vehicle ratings. 3 passes with 3 weights per pass. TV alone, TV with trailer on ball, TV with trailer with WDH. Front axle, rear axle, TT axle(s). Then you'll know how well your WDH is adjusted and what exactly needs to be upgraded if anything.
I think you'll notice some improved stability with closer to 45psi than 36psi. Check your tire's ratings for max pressure.
If you want to swing the $40k stick, I think you'll find a half ton Ram in the same boat.