because it is second hand it is completely invalid?
No I'm not but as I said if you find a niche or develop a product then you move yourself out of the common market. There are differences between the build process in Poland and here, what with our regulations and 'way of doing things', so you don't have to go too crazy with developing some fabulous new idea, just offer the client more than the common builder.
Furthermore, I have found that, from a buisness point of view, it is far more benefitial to forget the client who wants to haggle over the pounds and the pence. Offer quality to those who want it and will pay accordingly. This sounds obvious but it goes against the grain for many builders.
who does not have to try and get onto the housing ladder at some point in the UK?
I'm not sure about this. I don't know any Polish people who live in toilets or pay 20p a night to stay where? I only know Polish people who pay the going rate for privately rented accomodation and who wish to get on to the property ladder as soon as they can. Thats not a sarcy comment either btw!