Based on that thread you are looking at a startup cost of £3k
You make it sound expansive.

Joking aside, the big question is what you want. With printers right now you get what you pay for. The higher end extrusion printers are decent, and I think that with some acetone or green stuff and sanding paper could produce very high quality models.
It should be said that the 3d printing market is a rapidly shifting one. New techniques are being developed each year and waiting out for something new might not be a bad idea. My printer, a form 1 was something I had eyed for a decent time. they made claims during their kick starter I thought unlikely, but they delivered. that was more then two years ago and a decent competitor at their price/quality range has not presented itself as far as I know, so I took the plunge.