Seriously. I bought some dirt cheap full grain leather biker boots 3 years ago; I have given them exactly 0 care, abused the snot our of them daily, and they are still holding up strong. These weren’t even boots meant for working and they still survived trudging through the various slops of all 4 minnesotan seasons for 3 years.

As long as you are buying actual leather and not “genuine leather” then whatever you buy should easily last several years even if not cared for. Well cared for leather goods can last decades.