Well I can do, cheaply? -probably not, depends on your bargaining and searching skills!
In our old house we put in a floating floor. In cross section think of a lasagna. The bottom layer is your concrete floor, next a layer of builders DPM polythene, then Jablite or similar flooring grade insulation boards. On top moisture resistant, flooring grade T&G chipboard or your choice. Downside is a step up on existing floors.
At the time we did our old house the standard was 50mm jablite but these days they list 70 & 90mm.
For my 5M x 4M wooden 'shed' sorry
studio 
in the garden we bought seconds foil faced kingspan insulation and did the floor, walls and one layer in the roof for £150. We didn't mind that they were odd sized sheets as we had to cut them anyway.
We just gooogled for seconds insulation and rang around - we found the staff at the suppliers helpful.
This is a Jablite leaflet
http://www.ribaproductselector.com/Docs ... 607759.pdf
Hope this helps. Otherwise lots of carpet and put down newspaper and polythene when you work!
