I'm not really fond of this idea to be honest. Like the others have stated above, I think it's all about hard work on actually making money otherwise, in the end, your 5x31's and 6x31's won't feel as rewarding. I mean there's always Gilan's guide to breeding mediocre-level comp Pokemon within a budget if you want, which was quite helpful as I may say, so I say leave the "perfect" multiple 31's to the perfectionists who are willing to actually invest more into breeding.