After several months of tweaking the site, I've launched a cross-platform ads campaign to see what cost per acquisition (CPA) looks like.
Because this is so new, I don't have a good sense of lifetime value here. So I'm not sure (yet) when these ads will have "proven" anything about the ROI on PPC campaigns.
But because of how this tool is used, and based on my experience with this target market, I'd be shocked if averages sales per customer was anything less than 1.5-2.
I know there are still some issues with the site. Nothing that doesn't work, per se, but definitely some areas for improvement. I'll be working on those continuously over the next few weeks.