Okay, here's my thought:
My son is 12, and is taking the babysitting class this summer. Two friends, both with triplets, have asked if they could hire him on a semi-regular basis as a baby wrangler. He's good with littles, and being 12, he works cheap.
Could you possibly make arrangements with some of the homeschooled teens or middle schoolers in your area to hire one as a once- or twice- a week aide? Either the older kid would help get one or two of the bigger ones focused onto a project they could do together (and how cool would it be to have a "big brother" of sorts if you're a 4-5yo boy?), or he could shepherd the littles while you work with the older two.
