Nope, no tire eating with those specs. Keep the camber under -1° and you won’t notice any abnormal tire wear. I’ve run -1° up to around -1.5°, once you go past 1° you will start to see camber wear if all you do is freeway driving.
The caster is fine, I run +6.5° with 16:1 manual steering and 275’s up front. +3.5° with 225’s will be easy still, and you may not get that much caster with factory UCA’s and offset bushings anyway.