Sounguru
Guru at being an expert
The thing to keep in mind is that Yo-Yo's and Clown Loaches get big, really big.
Also, as I understand, the problem with assassin snails is that they, too, breed, so instead of a tank full of multiple kinds of snails, you end up with a tank of all assassin snails.
They breed real slow and grow real slow, plus the young can be sold to help fund your addiction.
They also require a male and a female so once you see 2 mating remove one and no more problem.