Dan
I would do a 'QUALITY' leaflet promoting all your services (including the gutter clearing and cladding) with good, clear pictures for EACH SERVICE.
I wouldn't bother about bronze, silver and gold (I think it will just confuse customers).
Whack them out around Glenferness, Talbot Woods, Ferndown, all the biggies and see how you get on.
You could even head down towards Sandbanks if you're feeling 'saucy'.
Also, If you are building a 'round', it is inevitable that you will get all sizes of houses and you will have to learn how to clean them efficiently between the two of you. Obviously, at a later date, you can drop the houses that you don't think are any good, but as you are just starting up, you need everything you can get.
I did a full clean today (including 4 sides of cladding) up in Bearwood.
Give me a bell if you need a hand with your cleaning technique etc.
Robbo