It was nice when Parts Express offered cabinets. They looked quite nice and cut out the most time consuming part of the build.
I would suggest that first timers go with a nice predesigned kit from a reputable designer. Tweak things if you will. It's too hard and total guess work for most of us to design a speaker from the ground up without a lot of resources for measurements, etc.
Of my builds,the speaker that least impressed me used top shelf drivers. I was impressed by the design and specs. But it just did not involve me emotionally. Go figure. My two favorites included a full range driver in a 0.5 cf enclosure, the other used a pair of inexpensive Vifa drivers with a series crossover. Both of these were models of simplicity that truly were satisfying builds and very involving speakers. And I would suggest these did outperform commercial products at there price points.
If you add up all the time you'll spend, don't fool yourself into thinking you'll save a bundle. This is something you do as a labor of love, a learning experience. My time is valuable and I have no regrets.