Hi Bennymon,
If you are thinking of doing domestic ovens as an extra, you would be better off combining it
with your existing carpet cleaning and doing end of tenancy cleaning.
You can do it all yourself this way and its more worthwile than just an oven cleaning job.
People usually want the whole kitchen deep cleaning ,and most other rooms throughout the property,
so you charge accordingly.
If you do some window cleaning, this can all be combined.
You wont really make much after just paying a wage, equipment, fuel, vehicle, for someone to clean a couple of ovens.
If your thinking of getting a dip tank, how many ovens will you need to clean to pay for it.
I would only use one for commercial kitchens as its worthwile.
Youre not going to find 3 ovens per day easily.
Im not trying to put you off, but this is just some advice from my own past experience.