1 Earthquake would be an inciting incident, spiders infesting the complex would be an inciting incident. Having both in the logline gives the logline two. It seems the spiders infesting the complex what really get’s the story going not the earthquake.

2: Yes homes are important but you didn’t even describe it as a home. you just said ‘an apartment complex’ giving us no connection or reason why it is important to the lead character… No stakes.

3: I just say fast breeding isn’t gripping because I don’t see any danger in it. You tent the place and kill them.

4: I used wanna-be because you said he didn’t have a degree in entomology.

5: I don’t see how making someone move saves the complex, you said the spiders weren’t deadly so what is the danger to the residents.

1: I am not sure the earthquake is needed in the logline since is just seems to be the setup.

When an apartment complex is is infested with fast breeding spiders.
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2: Why is this apartment complex important to the lead character?

When his arachnophobic mother’s apartment complex is infested with fast breeding spiders
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3: Fast breeding isn’t gripping.

When his arachnophobic mother’s apartment complex is infested with deadly fast breeding spiders
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4: ‘Young’ is probably the worst way to describe a character since it tells us next to nothing about them.

When his arachnophobic mother’s apartment complex is infested with deadly fast breeding spiders, a wanna-be entomologist must…
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Finally I am not seeing a written connection between forcing someone to move out and saving the complex. Will the spiders suddenly go away when the veteran moves out?

Hope that helped, good luck with this!