[QUOTE=trubandloki;7940360]
The least expensive material is still money spent which does not have to be spent if you have a free source of other material.
2x4s are not free or even close to it when you have to buy them in quantity.[/QUOTE]
For sure! It’s all about understanding the resources you have in hand (which includes both materials and time), what other materials cost, and your expertise. For example, if the pallets are in a pile on your property, they are indeed free and even negative cost, because you don’t want to pay to throw them away. If you will have to scavenge them out of dumpsters a few at a time, your gas and energy may cost more than the 2x4s that you’ll be adding to the several hundred dollars of plywood and roofing materials. Each of us are in a different spot there, so it’s up to the builder to figure it out ahead of time.
Novice builders tend to overestimate the cost of materials and undervalue their time and frustration and how much money you spend driving back and forth to the hardware store because you need One More Thing to make this all work. Having detailed plans can be a big help too in saving time, money, energy, etc.
Pallet shelters like the goat shelters, where you don’t need to skin them, are brilliant.