K.C.
Well, it really depends on how much you are planning to do and how nice you want it to be. You can do a bathroom for $1500 or $5000. You can do your whole house, but it will be probably over $100k for a big house. It really depends on what you want to do. Windows are very expensive, but you can often get a tax rebate for energy efficiency. Refinishing cabinets is much cheaper than getting new cabinets built. Tile countertops are cheaper than granite. Ceramic and porcelain tiles are cheaper than glass or natural stone tiles. You can buy new lights at home depot for less, or buy them at a lamp store for a lot more. Laminate flooring is a lot less than hardwood. Carpeting can have a $5 per square foot (or more) difference depending on what you want to choose.
Bottom line: there is a HUGE range of how far your money can take you, depending on what room you're doing, how nice you want it to be, and how much you want new vs. refinishing what's already there.
no matter what, it won't be cheap and it will take a long time!