Cheap hotels in kaula lumpur?

Can anyone recommend any accommodation with free Internet access at 70 ringgit per night. I will be staying in KL for 5 days. One more related question. How much US dollars can I bring in cash as a. Miminimum requirement? I heard that I can not bring more than 1,000 ringgit in cash so I will bring us dollars. Will 400$ be enough?