City Research - "on a budget"

I am looking to have the following cities researched. New York London Paris Barcelona Amsterdam Dublin Rome Toronto Madrid Istanbul What I am looking for is where are the best and cheapest places for a budget traveller. The categories I am looking for are Restaurants Hostels and Hotels Bars Clubs Shops Sights Trips Buses/Trains/Taxis Emergency numbers I am looking to create a document which details the best places for a budget traveler in these categories above. I am looking for at least 20 pieces for each category. Need to know Name of place Prices Location Phone No. Link to site (if any) Contact me for more information only if you have experience doing research work like this. All links will be checked before payment is made. Total amount offered is 100 dollars. Thanks