You have some good points but you have to take into account some of the inverts that Aidan keeps.
No matter how well caged, a black widow and venomous scorps wont sit well no matter how well they are kept... Also, the millipede is an illegal animal period...
I would strongly suggest the temporary removal of these specific animals if an inspection or visit from a city official is expected. Why bother even trying to fight it when there are easier solutions?
I don't know of many cities that would tolerate a black widow as a pet...
Just my 2 cents,
Keeper of 5 snakes, leopard geckos, 1 green iguana, 20+ tarantulas, 2 dogs & a bunch of rats!