Most industrial halides are pretty good quality, these ones that I just sold had phillips bits all through the ballasts so they were pretty good. The one you are looking at is around $2-300 maybe more after shipping so you would have to weigh it up how much it was worth to you, also you have no idea what quality that one is, being "cheap" it might not be very reliable anyway.
It doesn't show it very well in the pics but there is a mounting bracket behind the light, you would just adapt this onto whatever you wanted to mount it on, you could probably find an old desk lamp with adjustable bits and adapt it onto that, just just hang it from your ceiling. Obviously you would mount the ballast elsewhere and just suspend the light fitting and bulb which doesn't weigh much.