If anyone PROMISES you front page of Google, this is not to be trusted. there are 10 spots of the first page of Google, if there are 11 website designers offering the same to all their clients, the numbers just don’t add up!!

If your targeted keywords were ‘plumber London’, this is going to be very very competitive, and difficult to achieve (not impossible) whereas if your targeted keywords were more long-tail such as ‘plumber in London specialising in boilers pre 1995’, this would be more attainable as there will be less websites specifically offering this service with a dedicated web page for it.