With September breaking a couple of days ago, light to a slight mystery has been shed upon. The word is about the 247 people that were supposed to be sent here in Gaster Kingdom 2 months ago.
Apparently, the reason why they weren't send was to shorten travel expenses. You wouldn't expect authorities to spend an extra few hundred gold coins for people without a proper skill.
The King explains that right before the homeless were about to be sent, over a hundred more reached down in Lav Kingdom due to the news of a better opportunity here in Ignis. Apparently the homeless people spread the word when they had time to wait.
Spending 2 medium sized ships on 347 people sounded like a bad move because the King wanted to use one only. It wouldn't be comfortable but it would be cheaper, no one is getting paid for this after all.