That's not the cost. You have to pay someone to re-sign your cert every (other) year. This is a largely manual process. It's also going to cost you, if you want

That's not the cost. You have to pay someone to re-sign your cert every (other) year. This is a largely manual process. It's also going to cost you, if you want any compensation at all when they forget. Which they will, no matter how well you prepare.