I'm not sure. If you count everything, including the parts waiting to be built into gear (I have something like eight amps boxed and ready for free time, not to mention two speaker amps, a preamp and the Orion+), then somewhere north of $20k.
That might sound ridiculous, but I've been amassing gear and parts for four years. Averaged, that's $5k a year and - not to brag - but a bit less than 5% of my income. So it's a bit of cash but I don't think I've been irresponsible. I could more than break even if I cashed out, too.
And this doesn't include the music, either. The LPs and SACDs add up, too, but I have no idea what I've spent on those. Just small amounts over quite a few years now.
This is probably the end of it, too. If I can (somehow) manage to find a job with a 40 hour week, I can get through the projects inside of a year. I'll need to spend a couple thousand more on aluminum for cases, wire, ancillary parts, etc., but the collection will cover pretty much all the amp topologies out there and give me a lifetime of listening and exploring how all these variations work together. I'll probably pick up the occasional top-tier new headphones and continue to add music. That'll just cost a few hundred a year.
