Well, the cost of the tools are, more or less, a one time cost. They will probably last your lifetime and if you're handy at all you'll use them for home improvement projects, other woodworking projects, or even more DIY audio projects.
So, just over $1000 for a pair of speakers. You don't say whether you feel that is expensive or not. It IS all relative, but for the quality of the speakers and the performance you'll get, that's really a bargain. Especially if they bring you musical enjoyment for the next 10 years. Or more.
So, have you built these yet? Still considering it? Just starting?
I'm working on a build of NX Studios from GR Research. My first ever speaker build. They cost a bit more than yours but I'm lucky enough (i.e. old enough) to have all the tools I need.