lolol. depends on who that 50 pop is. If it's teuton, hell yeah, go for it.
Actually, until you get in wars with other ppl, a hero really doesn't help much, if at all. And it takes awhile to get the infrastructure to build a hero's mansion.
And if you want to see how many troops and resource ppl have, you'll need scouts; it also will help you more efficiently allocate your raiding parties when your army gets bigger.