I don't have a favorite DIY article, there really wasn't much info out there when we I did this in 2017, which is why I wrote a long post about it.
That said, there really isn't that much to it, particularly when using 4 prismatic cells as opposed to 120 cylindrical cells. You need the following:
1. The cells (what ever capacity you want).
2. Bus bars to connect the cells - the cell manufacturer often sells these, but if not some 1" aluminium flat bar with holes drilled at the correct spacing will work.
3. The BMS. The one from overkill solar will work, but it looks like a rebranding of these, which are cheaper, and is what I am using:
100A BMS with bluetooth. The digram in the overkill solar ad pretty much tells you all you need to know about wiring this up.
4. Some sort of connection for the battery, either a pair of heavy duty screw terminals, or something like a high current Anderson connector.
5. You don't necessarily need a box, but you do need to at least clamp the cells to prevent them from swelling. I don't know of anyone who sells a pre-made box, but it would be a simple wood working project. If you just want to clamp the cells, then you need two end plates slightly larger than the large face on the batteries, and four sections of threaded rod to provide the clamping force:
Image from http://nordkyndesign...ine-house-bank/ , which seems to be a pretty good resource.