SOME SUGGESTIONS FOR SEARCHING INFORMATION:

http://www.travelodge.ie/

http://hotels.lonelyplanet.com/


http://www.roomsinedinburgh.com/
On this website, you can choose between different options of accommodation.
For example:

Hostels: from 7.5 pounds per person/day until 25

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Bed and Breakfast: from 30 pounds per person/day until 140 (this pice is only for wealthy man)

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