I am digging out from under a mound of patterns for dolls, fabric for dolls, and accessories for dolls. I have almost found the surface of the bed that serves as a cutting table when a cardboard mat is placed on it. If I stack all the commercial doll clothing patterns in a closet, I might die from the avalanche when the door opened. We are not counting hand drawn patterns or indie patterns.
Once upon a time, a pair of denim pants tried to strangle me around the waist. These hybrid jeans had a waistband that was half elastic and came up too high. I tossed them into a To Do pile and ignored them for months. A couple of months ago I chopped off the waistband and a bit more, and the pants fell off. Today I took in the waist and gave the pants a band cut on the bias. Better. Not great, but better. They neither fall off nor strangle.
When sweatpants the same color as some I own and love turned up at a 2nd hand store, I couldn't leave them there, even though they were much too small. Enlarging sweatpants takes time, fabric, and a seam ripper. The stash spat out a cotton knit that does not scream too loudly with the lavender of the sweatpants, and I was able to piece in a stripe at each side. I had to remove elastic at waist and ankles, add strips, and put in more elastic. This is not worth the bother until you look at how much all-cotton sweatpants cost compared to acrylic and polyester sweatpants. Costly and comfy vs. cheap and itchy. The pants will never be lovely, but will always be comfy, unlike clothing with more than 20 percent polyester. I tried to take a picture, but the pants refused to cooperate.
Yes, it is possible to find 2nd hand pants that fit pretty well for a good deal less than it costs to buy the fabric to make my own, provided I search through several thrift stores and am not terribly picky about color. On the other hand, once I have the fabric (and I have a basement full of copier paper boxes of fabric), there is nothing to stop me from using a tried-and-true pattern to make pants day or night. I want corduroy pants, but I have a box of velveteen. I now have a pattern that fits tolerably well but cannot be considered tried and true. Progress has been made.