[Jack Simth]

There's different kinds of loaded.

He can't leave a big wad of cash at the orphanage - it'll be stolen. Likewise, he can't leave a food-producing item at the orphanage, as it, too, is very valuable.

With the undead, nobody wants it (not edible, can't sell it, less dangerous ways for a necromancer to get skeletons, and so on), and it defends itself from most threats.

In order for money to make a proper solution, he needs to leave something more along the lines of a golem; a Flesh golem is the least expensive, at 20,000 gp - but requires casting an Evil spell. A Clay golem is next up at 40,000 gp, but it goes Berserk fairly easily, and doesn't go un-berserk. An Iron Golem will do the job admirably, but runs at 80,000 gp (curiously, less expensive than a Stone Golem at 90,000 gp... which is odd, as the Iron Golem has a higher CR, and is equal or better in all vital statistics; the only advantage of the Stone Golem is that it's faster to repair).

If he's got a 14th Wizard and Cleric buddy handy that are willing to blow 3,000 xp, some Animated Objects will do the job (or he can hire it done; but the Permanency, as a 5th level spell at caster level 14, with 3000 xp as a component, has a market price of 15,700 gp - over the "not generally available" purchase threshold. A minimal casting of Animate Objects, also required, is 660 gp. Potentially duplicatable by a single Polymorph Any Object from a Wiz-15, at 1,200 gp, depending on DM ruling - all this, however, assumes there's an appropriate caster in range for hire, which only exists at the DM's discretion).