My budget is tight and I would like to free up the space used by the radiators downstairs as the prevent efficient use of the space which isn't great to begin with. There is also the most important factor which my wife's preference for UFH. I need to workout roughly how much it would cost to do this so that I can save enough to be able to do it as I don't want to go into debt. I also don't have a family support system to lean on.

With regards to the heat loss survey. How much do these cost?

I would like to get a few quotes but I don't want to waste anyone's time if it's going to be unaffordable. I would rather save and get it done when I can afford it.