Your video shows an acting area that is also 2m high. Unless you are happy with a lot of spill this suggests using a small number of fresnels rather than a lot of PARs. 6/8 halogen PARs are going to need a lot of power (could be a problem if you only have one 10A outlet available); 6/8 decent LED PARs are going to use up a lot of Drachma (sorry, Euros). The cheapest, & quickest to rig, solution would be four 500W Fresnels (CCT Minuettes are ideal for many reasons, though their barndoors are a pain), 2 each side, about 4m downstage. Tank-traps are fine if you use a large enough van to take the scaffold poles; if not then you will need folding stands that will reach to at least 4m. The video suggests that you don't need backlights - they would be difficult to position, & would merely highlight people who are pretending to be invisible. I am assuming that your lighting changes are basically Up & Down, so if you go the halogen route then a simple 2+ channel dimmer (or even a 10A follow-spot dimmer) would be fine. If it does not have faders there are several palm-sized 6-channel analogue "desks" available, some of which also output DMX. If you can find decent warm-white LED fresnels within your budget then you will only need the "desk". I would definitely NOT use a laptop-based system - it is overkill, the hardware is fragile (& very attractive to thieves), & pushing a real fader up or down is a lot easier in the dark than a keyboard or touchscreen.