How much money do i need to bring?

I am coming to attend a conference. So there wont be much roaming other than in the evenings. 4 days i will be in Baiyun. I am a vegetarian. I heard that there wont be food available for vegetarians. Kindly guide me regarding the food options for vegetarians and also about the money needed. If time permits i might visit one to two tourist attractions.

I am planning to stay in Days inn Guangzhou, 88 Yunxiao road, Baiyun District, China 510403. Kindly suggest the best way to reach the hotel from airport. Also kindly can you let me know the review for this hotel is it clean and good? Do they provide veg food. I called them unfortunately they cant answer me in English..

So food and transport would be the main expenses as hotel is booked. How much is the estimate i need to have. I read that we need 5 and 10 Yuan notes to buy the tickets as mentioned in this site. So kindly can you let me know how to get change for the same.

Many thanks in advance,

MM