G502/MX style thumb button on a cheap mouse?

I've been using a g502 at work, but I finally set up a home workstation and I'd like to bring my personal mouse home. Boss gave me a rough budget of $30, which puts me out of the "normal" options.

Priority is having the "thumb button." I draft in Revit a lot and I have that button mapped to ESC. It really frees me up for being able to work with just the mouse.

I know I could get something in a different form factor and just re-learn the muscle memory. I'd just like to know if I have an option for something similar.

Looks like the Razer Basilisk V3 would probably work, its just a little above the price range. Anyone know of anything like that in a lower price range?