mike... seems you are serious about this and enthusiastic to get started. 
one pitfall , I can see for you is if you advertise special offers on flyers.  this is a very bad idea , it will attract people that want a one off clean.
what you want right now is a regular customer base . 
you may not realise it yet , but first cleans take a lot longer than a general 4 week or 8 week maintenance clean. with wfp the first clean needs a very very thorough clean!
it is always wiser to charge a first clean price. eg .. if its a regular monthly of  £12  you charge £20 on the first clean. 
if its a regular of say £18 charge £28
this not only boosts your revenue each week, but it also means that if a customer is prepared to pay the extra , they usually turn out to be good customers.
do not get a huge amount of flyers printed . you will need to play around with different ideas .... wording etc . 
you need to find which design is going to work .... if you get it wrong the first time and have thousand put out , you have wasted your time and money. 
trust me on this ... you need to get your flyers right. so you need to experiment 
good luck with everything