I'm looking at approx £750 for a full 42u cabinet with 8A (1.8KW) power presentation... if you're looking though watch out for A- Hefty setup fee's and b-n nasty connectivity charges. With mining you don't need a 10G lease line...
I could fit 10x 1TH/s miners plus a switch into a 42u rack but I have no idea if 8A (1.8KW) is enough power though
Each Terraminer uses just over 9Amp @ 230v you 90+ amps per 42U cabinet