My tip for frugal diapering? Sew your own!!
I'm sure everybody has some cotton laying around in various forms -- old t-shirts, sheets, jeans and even socks!! All of these can easily be made into diapers... and you'd only have to make them as 'complicated' as you wanted.
If you're not so sewing inclined, even a simple contour is easy to make -- or easier yet, cut up an old flannel sheet into 27"x27" squares with pinking shears (to minimize fraying) and you have a flat right there!
Ooh, and where to socks come into this? Often many men's socks (athletic ones in particular) are made from a wonder terry-like material... even if they're not 100% cotton, usually the cotton content is darn high. So, make some soaker pads out of old socks -- they can go in the inner layer of the dipe for contours, fitteds, etc.... or just make some doublers for use at nighttime or nap time.
Have a bag/box of clothes that were gifted to you, but you really can't bear the thought of wearing *that* in public? Cut up the material for diapers!! That's what I've done with a huge box of maternity clothes an aunt of dh's gave to me (nice gesture, but she told me she just wanted rid of the clothes... and after looking at the prints -- most from long ago -- and the style of the clothing, I thought I'd do my best to recycle what I could).
And then for covers, most people have made the mistake of throwing a beloved wool sweater into the washer only to have it shrink away to nothing -- don't toss the sweater, make recycled covers! There are tons of patterns out there on the net (very easy ones too!) for recycled covers. And if you've already thrown out your sweater, you can usually find something dirt cheap at a thrift shop and just felt it up on your own. ... OR! fleece! if water beads up on the fleece it is water repellent and will work as a cover, so check your house and if you can't find any, head to the thrift shop.
Diapers don't have to be organic velour with $70 longies to be 'good' diapers. They catch poop for crying out loud!!! And, by recycling materials already in your house you'll be: decluttering, recycling, reusing, saving money, and hopefully (most importantly) saving your sanity by not worrying about finding money to buy all of the diapers.
Judy, wife to my Catholic deacon husband ... homeschooling mother to my four girls, a boy, and someone new in May '15! Forever remembering our loss (8/11)