2,000 yuan to travel to Hangzhou

If you can book a special ticket, the flight from Beijing to Hangzhou only costs about 300 when it is cheap, and 1,000 for a round trip is enough.

If you are willing to stay in a budget hotel, it is enough. For example, Motel, Home Inn, Pudding, etc. can basically be solved within 200. The price of pudding is around 105, but the room is small, so it depends on your personal choice. A two-night stay like this costs around 300.

The West Lake is free. Only scenic spots charge, such as Lingyin Temple, Leifeng Pagoda, etc. The 500 admission fee is enough. The rest of the money is for your personal expenses.

To sum up, 10030500, leaving 700, should be enough.