at dollar tree they have some drawer dividers that will work as log molds. For molds I recommend checking out thrift stores, you can get some awesome finds. Just keep your mind open for what could become a mold
I just picked up this small wood crate, its got solid short sides, and the long sides and bottom are made of 2 pieces each. I'm going to stick cardboard inside against those wood sides. Then line with freezer paper
step up from just the plain cardboard box! No bowing sides. Plus I got a nice sized silicone loaf pan with lid. The little wood thing is perfect for small batches like 1-2lbs.
Dollartree has great soaping supplies when it comes to pitchers to mix in (I got the same ones in the soaping 101 dollar tree video), large measuring cups with pour spouts to use when measuring out oils or separating soap batter to color (we got 4), spatulas, spoons, vinyl tablecloth for easy cleanup, disposable paper cups for weighing out lye, parchment paper to line molds.. and more!
Oh if you go for the cheese slicer, be cautious about sizes especially when ordering online. Many of them are really small and it would be difficult or impossible to cut large loaves. I've also found sometimes they will not list the full dimensions, but the dimensions of the block not including the section on the other side of the wire. Its strange, but usually its the width you need to pay more attention to than length for making sure it will cut large enough loaves. I'm hunting for the right one and won't get one with that width (smaller number) smaller than 6 inches. And there are plenty of ones that are smaller than that.
For now I rigged up a ghetto slicer. Attached a guitar string to 2 sharpie markers lol (they were laying around!) With a guide, it makes awesome cuts. I use pringles cans for molds and took one of the pringles cans and split it down the long size (and bottom had been cut off) to place the column inside and move it around without damaging it. Then I used a ruler to measure the amount sticking out and used the slicer along the top of the can for a perfect clean cut. If it wasn't for joint problems and nerve damage in my arms I'd stick with it for saving money.