Buying a factory built set of speakers while you are building your own is good advice. Way back when I was in high school it took me months to build the Speakerlab Khorns. It was good to build like that. I couldn't get in a rush for the next step. The result was crazy amazing for the bass and treble, but the midrange was not good to my ears. OTOH, I have built several different speakers since then with varying results, mostly fantastic. It helps to work with an engineer who gets the design side of things while I get woodworking side of the task.
No doubt, they always end up costing more money and time as well.
After seeing commercial cabinets, there are VERY FEW that build worth a crap, regardless of price/outward appearance.