At some margin I think this would become an important consideration (e.g., advocating some policy that made being non-vegan super expensive) but at the current margin it seems like these costs are just extremely small relative to the suffering reduction they induce.
Is there a cost-effectiveness analysis that takes these costs into account? I don’t think I’ve seen one.
I am a GiveWell donor because I want to spend money to improve the world. Should I do something else with that money instead? If so, what?