We are arriving in Paris Nord station on July 26 and leaving from Paris Gare de Lyon station on July 29. Just want to know where is the ideal place to stay at least less than 100 euros double room/night, covenient between train stations and sights in Paris.
Check www.booking.com and find a hotel within your price range. Public transportation is great in Paris but you should be able to find hotels in Gare de Lyon vicinity.
There is an Ibis Hotel close to the Gare de Lyon and their rooms are usually in the €100 range.