Well, I was taking it that it was a quick and dirty site solution that was required. Other folk seem to have other ideas...
I guess it depends on what renovating means. If it's house work with a circular saw, it's pretty hard to make a case for the mass I'm talking about.
I stole my idea from my mother more or less, though - two drawer metal file cabinets with a door would be about 32" high (if it needs to be higher, it can be stuck on something), and they're free here all the time as they're removed from offices.
My mother has a semi-utility room, and she is desperately cheap (and maybe a little lazy like me) and threw together a couple of work tables with used solid core doors and free metal drawer cabinets. For someone wanting the setup to be knock down, the top can just be screwed into the file cabinets (who cares if they get mangled if they're free), but the whole setup ends up being pretty sure-footed and the cabinets can be ballasted with books later if a permanent solution is desirable.
My mother later turned her setup into a desk by refinishing the door surface and putting a skirt on it. (The height of just the door and the cabinet is just about dead on for a computer desk).