I’m on – I think it’s a sweet idea – actors shouldn’t be a problem – there are plenty on this site
costumes would be a case of fancy dress – you could always make it a roman scene and have everyone wearing togas (white sheets)
i think you could cheat a lot of the perspective stuff with certain camera angles and simple post – I think inky’s ideas might work – especially the cheated perspective one – any set builders out there that would build us a fake wall?