Lighting Rental

 

A lot of lighting type places will charge daily and weekly rates, with weekly rates typically being 2 or 3 times the day rate (depending on company and item being hired)

 

Take a look at what places like Kave, Halo, etc show on their website for rates.  Don't forget, those rates are for the walk off the street customer usually, most people doing it regularly or over long periods won't pay that.

I think you're a bit off there...

Companies can and do hire that sort of kit.  You might be better off going down your local DJ shop and see what they hire out and what it goes for per night.  Most of the ones in Brighton that I know of (BAV, SussexDJhire, etc) put out gobo flowers for £15 to £20 a night for a walk in punter.  Scans about the same.  I expect they'll be expecting you to provide on call support as well (10pm Saturday night, when you're just going out - Phone call "It's all gone off, can you come down and sort it out")

 

For a contract term of say 6 months you'd obviously give discount but don't forget, if this is all your kit, you can't take other jobs in the meantime.  I think you gotta be looking at £200/month minimum, plus factor in support somewhere along the line.  I don't think I'd do it for less.  What about rigging hardware, installation time, etc?