Don't buy normal trousers belts, instead buy elastic belts which can last literally for life
(i5.walmartimages.com)
I bought two Grip6 belts like a decade ago, and they still show very little wear.
It's a very simple design: a durable strap (no holes), and a buckle that's just a solid chunk of metal (no moving parts).
I would highly recommend them at the prices I paid back then... But holy shit their prices have increased a lot. Still might be worth it as a BIFL, but still hard to justify for such simple parts.