Pfh, who said anything about pets? It's merely a mutually beneficial arrangement to the satisfaction of all parties and nothing more. Needless to say, the opinions of wild yukkuri need not factor into the consideration.
Of course, it'd be doubly awesome if you could get a Yuyuko to handle both functions, but I don't think my wallet could handle the burden of feeding such a glorious but gluttonous beast.
Hm, no matter how ugly they get, they're still a lot better than real-life spiders. Granted, most spiders aren't really that bad (imo) unless they're big enough for you to start making out details.
Well, except tarantulas, because tarantulas are fuzzy-wuzzies.