I have 4+ rooms that will soon potentially have underfloor heating underneath. In order to do this, I will be taking the floorboards up and putting them down again (hopefully not breaking too many in the process) and then leaving the wood showing (no carpet etc). I may just paint them, however I love the look of varnished wood, so I'm contemplating ways to sand the floor. This project I'm guessing will run over 3 months (due to time limitations) so I'm ruling out hiring gear as this would be way too expensive in the long run. Instead I'm thinking of buying second hand (if drum e.g. Hiretech Ht8) or buying something semi decent. Previously I have used a drum sander (rented) to sand a floor and it produced a very nice flat and even surface. That being said I don't want the cost of buying one for ~£400 off ebay. However, I'm not sure if those commercial ones have cheaper sand paper (so could work out cheaper over time). My question is..... if I'm taking up the boards anyways, I'm thinking I could put a board on my work surface outside and use a belt sander to sand them down. Someone also said I could use a orbital sander also. That being said, if I do this I know I wont get the same consistent flat finish as using a drum sander when all the boards are equally laid down e.g. all the same height so looks more like engineered wood. I personally like the idea of a more 'characterful look' but I'm worried it may look shoddy at the same time. I was just wondering if anyone has done this approach before, and if they have any images to show what that 'uneven' look might look like? All thoughts welcome, but please keep in mind I have 4+ medium to large rooms to do. Also any mentions of good products to use would also be great.