I'm using Org-mode which can export to LaTeX -> PDF [0]. I use Org-mode for invoices [1], reports, time-tracking, etc. Using org-babel you can use Gnuplot[2] or R [3] to embed charts and other visuals.
Do you have any idea how much memory/cpu does this conversion takes? We use wkhtmltopdf for an enterprise app but it's slow and takes too much memory. Latex -> PDF does sound very appealing.
I haven't personally run any memory or cpu performance tests. There are online LaTeX editors out there; ShareLaTeX comes to mind. My point being that if online services like ShareLaTeX exist, then the conversion process shouldn't be horribly slow. As always, YMMV.