By far the cheapest and easiest epigraphic display is a large whiteboard. And when it comes to whiteboards, you can’t be too big.
Using commercial products for do-it-yourself whiteboards from here.
She plays o' the viol-de-gamboys, speaks three or four languages word for word without book, hath all the good gifts of nature, knows a hawk from a handsaw, and can see a church by daylight. The rest is subject to fancy.