A ten dollar set of Dickeys Perry suspenders utilized at work with my Bianchi gun belt underneath my outter carrier vest solved all my issues. I liked it so much I started wearing them with my off duty concealment rig. Nobody sees them as my cover garment hides them and it took all the weight off my hips/lower back.
I now no longer tug and pull at the belt to get the gun back up where it is supposed to be (no hips) and all pain has left the building. I wish I had bought them years ago. For me, I had to wear the belt super tight to fight gravity and that belt dug in and caused all sorts of pain on my right side. I can now wear the belt a tad looser and the suspenders hold everything where it needs to be.
Might be a cheap solution for you.
Regards.