Treating the yard perimeter and your house perimeter are good ideas. Earwigs and scorpions are common with new builds especially if you have brick. Every house we built we had scorpions in the beginning. Are you going to renew your contract.
Growing up in Texas even as a kid I was trying to kill fire ants. I won't confess some of the things we tried, I could still get in trouble for them. I have seen fire ants swarm, kill and clean down to perfectly clean skeletons of many animals. I hate them most for taking away the horned toads...