Hi Lee
Go for it !
I think its a great idea, especially if you role it out nationally and sell leads to those in the consortium (dont forget me!)
As you have said many are spending that on leaflets with poor results. I would expect the tv results to be far higher than any other direct medium. its just whether the return is there for the spend.
Sean
Your figure of 833 leads converted is an over simplification, you wouldnt expect to get your return on investment like this immediately a few hundred jobs at 12 an hour would pay for the adverts over time.
That is managable and if you look after them you will keep most for years, your costs of advert, vans,staff, and insurance would be covered in year 1 perhaps with a small profit, in year 2 you would have estabilished work.
After all if you brought a round worth a few thousand you would pay this sort of money for it and we all know that can have its hickups. and you wouldnt earn anything of it until fourth or fifth clean.
Another thing occured to me as well, I think you might start to see a pattern of areas where there is no window cleaner or people are dissatisfied. you could then target canvassers in areas where there is going to be a good reception.
cheers
john