This will be a gradual trophy you'll earn through trying to raise your cemetery's score for more money during prayer. Aim for getting 5-6 white skull corpses and burying them, but you can exhume corpses for a small fee later (if you have any with red skulls or less than 5). Once you plop the fiftieth corpse into the ground, you'll get this trophy.
User Varledir has confirmed that if you have at least 13 silver readily disposable, you can bury and then exhume the same corpse multiple times to reach this amount. Burial certificates are valued at 1s50c and exhuming permits cost 1s75c, so a difference of 25c multiplied by 50 is 12s50c.