Tis the season to appear to be raining on everyone's parade. The OP says "we are getting....should be here in July". That sounds like a pretty much done deal. I'm no expert on #s, but from what I do understand, he's going to need to weigh the potato chips when time comes to load. Modding all the things to his tow vehicle seems like bandaiding. And it's going to cost $$$. So seems like we've again managed to ruin someone's day. OP, what would be the chance of finding a gently used truck that does have a beefier towing capability....forget new if that doesn't fit into your budget right now. You might be able to find something that would serve you well and SAFELY for a couple of years and then move up if you want.
It would be so great if manufacturers gave easier to understand #s, took the game-playing out of it, and everyone would be happier. It's a bummer for a newbie to find "the perfect" trailer, do a bit of homework that makes them feel that they're good, and then the whole thing unravels. So sorry OP, none of us enjoy sharing the bad news, but we'd rather tell you that you have a problem than to read about it in the news. If you can't work something out on the truck, would your dealer let you make a change to a somewhat smaller, lighter trailer - even though it's not perfect - and look at changes down the road?? Keep us posted.