1 Depending on the tile selected, do-it-yourself tiling of the floor of a typical bathroom can cost $100-$1,500 or more. 2  The tile alone can be $1-$40 or more a square foot; replacing backer board adds about $2 a square foot; and do-it-yourself tools and other material can be $60-$200 or more. For details see, How Much Does a Tile Floor Cost. 2  Retiling around a bathtub or inside a shower enclosure can cost $800-$2,500 or more, depending on the type of tiles, total square footage, the amount of repairs needed, any special pattern or border, and local labor rates.
Applying two coats of stain to your hardwood floors will result in darker tones; however, this may be necessary to obtain the stain tones you wish for.
Understand that the color will soak into the wood and fade slightly. Pick a finish that goes well with the room, and pick one that you're willing to live with for a long time. 1  Depending on the brand, you will need 1-2 gallons of stain for an average floor. 2  If you are attempting this for the first time, get a water-based stain: it is much easier to work with.