That's a service I don't charge for, considering it's technically "research." Perfect resurrection is an impossibility, and the general imperfect resurrection leaves a lot to be desired. If someone wishes to continue living after death and not be a mindless slave/zombie, they need that imperfect resurrection. Which leaves them as an intelligent moving corpse, unpleasant to be around until it inevitably fails and leaves them gawping at their own time ruined form sprawled out on the floor. At that point they are little more than incorporeal observers until they figure out how to interact with things or until something capable of harming them comes along and does so. It's not a life worth charging for, otherwise I'd feel like I was scamming them.