As far as estimating the cost of replacing the normal outlets, I can only assume they cost between 5 to $10 a piece but that just takes a run to the hardware store.

The Bigger Pockets book store if full of great books: https://www.biggerpockets.com/store

The Bigger Pockets book store if full of great books: https://www.biggerpockets.com/store

The Bigger Pockets book store if full of great books: https://www.biggerpockets.com/store

The Bigger Pockets book store if full of great books: https://www.biggerpockets.com/store

Being a commissioned sales person myself, I understand there is a certain amount of time that you must invest in someone to build the relationship before you can really claim them as a client and claim ownership of that person amongst my peers at my store.

check your nearest big box home improvement store and ask if there are available scratch and dent units, negotiate accordingly.

@Jeff Berg I really liked a lot of the ideas you passed on - especially about installing large tiles diagonally - I've seen some great specials on those porcelain tiles at Home Depot too - although they differ by store - it's something I haven't seen too many examples of in flips though.  

The Bigger Pockets book store if full of great books: https://www.biggerpockets.com/store

The only place you'll find a better resource is by going to your local building supplies store and filling in the numbers where the books have ranges.