Moving across the country

We moved to NM from NC last July. Before we left NC we left some of our things in storage, our most valuable items that wouldn't fit. If I remember correctly, it's a 10x10 storage unit through Uhaul, we pay $100/mo. I miss my stuff and I am also tired of having to spend an extra $100/mo.

I've gotten several quotes from moving companies and they are crazy expensive.

Budget Truck rental seems like a good deal, my mother-in-law used one for her cross country move. I've done the math and total, I believe, the cost (including gas) would be around $1800.

I've also looked into busfreighters and Fed ex for my smaller items, therefore I could get a smaller truck

I also drive a Dodge nitro, that is capable of using a hitch system. But it does struggle to climb mountains, big ass car with a small as engine unfortunately. I don't know if this a good option, I've yet to try to haul anything with it.

What have any of y'all done for a move across the country to save money? I'm looking at the first week of August to move our stuff.