Unless you know EXACTLY what you are doing---going to Lowes or Home Depot for the DO-IT-YOURSELF home improvement supplies COULD end up costing you MUCH more then hiring a professional contractor to complete the work..... So, unless you know how to rewire electricity, put up drywall, tape, measure flooring and install it, place tiles, replace fixtures, etc etc etc... HIRE SOMEONE.... because if you make a mistake (and you probably WILL), it will cost you more to keep trying to get it right...just make sure you hire a REPUTABLE CONTRACTOR with references...and you will have a LOT fewer headaches, you'll have the work completed MUCH quicker then if you attempted to do it yourself AND, you will have a professionally done job.