I saw your main plot as what Blake Snyder describes as ‘monster in the house’…(there would be more tension if ALL tenants were trapped inside…more victims etc…) Maybe they could turn to an exterminator, but who then also falls victim to the eight legged freaks..? I don’t know.

To be honest, my example was just how you could deal with the whole entomologist/ amateur/ no degree issue — the ‘hook’ imho, is not the fact that the hero ‘bonds’ with anyone — a great subplot/ ‘B’ story for sure, but the fact that the hero is an 11 year old geeky kid who’s into entomology… for the sake of describing the arch plot in the logline, the war veteran doesn’t require a mention — but that’s just from what I have gathered from your posts… He might be crucial to your story..? I don’t know.

Anyway — best of luck with it.