I think you are making it too complicated. I have tried all these ideas and now I just have price bands and work from there. A basic three bed semi is £x. If is bigger than a three bed semi the price goes up pro rata.
You are always going to wonder whether you could have got more. This is particularly true when the customer says "Oh, is that all? I thought it would be a lot more than that" ( actual quote said to me last year). In general don't lose sleep worrying about it.
Stage one of building a round is to get a good number of customers. As long as the price is reasonable thats enough. The time for experimenting with prices comes later. At the moment a bird in the hand etc.
whats complicated about counting windows also looks more pro looking around and taking time pricing up and not a figure off the top of ur head.
ie my dad and i both live in 3 bed semis. dads house comes in at £23 mine £10 big big differance
yes building around of customers is important but how many times have we started on the first house say for a tenner (little under priced) then have 5 asking for price and they all now each other so you feel you got to charge the same a tenner. suddenly we have 6 underpriced houses.
i say start were you intend to finish so price correctly.
i also never price while i am at work take their name number address and make an appointment, then i can spend time with them explaining what we do point out maybe their price rose bush ect look so much more pro then hit then with the price after i have gone round assessing the the property go to the van do the sums and present the price on a slip i all ready have made with all the details on it as well as company logo ect.
not saying i get every one but 8 out of ten i think ant bad. and they are well priced houses. (30-50p/h) and yes allways a first clean charge i find if they dont understand this charge they will drop you but find most customer fully understand and dont butter an eyelid and they are the customers you want.
every custy gets a letter on headed paper after the first clean expaining everything again including the fact sould they cancell on the day then 50% of their price will be due again they will know your terms and conditions.
this has all been my policy and not for many off you on the forum but i never cold door knock, leaflet yes as i feel its better customer contact you rather then you knock.
this way it is they need you not you need them and also you target the areas you want do do ps. i stay away from housing ass, counsel extates ect as these to me are not worth it call me a snob but like someone else pointed out better better 20 £10 houses than 40 £5 houses.
many of my days consist of 10-15 houses aday @ £20-25 per house ( not every day mind but most and building on the other days) have even given away 10k off work to make room