I think it's worth it. A compost pile is just that, a pile of waste plant material piled up on the ground. You don't really need any kind of container. However, containers are useful if you have pets or wildlife that like to get into the pile, going after fruit waste, etc. A bin just made out of a piece of metal fabric, like welded wire, hardware cloth, etc. curved into a cylinder shape and placed on the ground works very well. I used one like that for many years, after I got a dog that liked to dig in my open compost pile.
Some people make compost bins out of wooden pallets, which I gather can be found for free in some areas. Where I live, though, the pallets get reused by the companies. If you receive a shipment on a pallet, you get charged a fee. They refund the charge if you return the pallet. I think the last one I kept ... because I was too lazy to return it ... cost me $15, so I return them now. (A friend of mine collected some pallets from the alley behind a business and was charged with theft, so my advice is to make sure
the pallets are up for grabs before you just take them.
There are many pictures that members have posted here of compost bins they have made. Just look around and you'll find many ideas for inexpensive, and even free, ways to make a bin. But remember, you don't actually have to have a bin, because an open pile works just fine.