Last couple of times I've gone on moneysupermarket.com and got the Sheraton on Lothian Road for a good price, and got a king room with full scottish breakfast pre-paid deal, first time was thru DHR.com (discount hotel rooms) and 2nd time I canna remember. Breakfast was good though - eat all ye want bacon, sasssages, Scottish offal treats and fried eggs etc. And car parking was something like £16 for 24 hours in their own car park which is part of the hotel. Some hotels ye have a long walk and are £25 and up for 24 hours :-0
I think Tom Kitchin's is at Leith? Nae sure if there's any hotels doon there.