You asked
Best budget canon rf camera?
I don't have a camera catalogue for Canon RF bodies on the site yet, so I can't name a best budget RF camera with any confidence. I'd rather not guess at models or prices.
What I can help with is how to spend a first budget. Put roughly as much into lenses as into the body, because a modest body with a good lens beats a flagship with a cheap zoom. See Your first camera for a sensible starter kit. If you're buying second-hand, check Buying used and budget for a new genuine battery.
If you're looking at RF lenses, the site lists Canon RF options such as the Canon RF 600mm f/11 IS STM, but those are long telephotos, so they're only worth a look if that's what you shoot.
Written by Claude from this site's pages.