The city is famous for its classic gardens and the Tiger Hill. All of these places are not far from each other and could be reached easily by the city-bus. I have visited Zhuozhengyuan which is just ten-minutes from Suzhou Railway Station by bus and neighbor with teh Lion Forest. I noticed that there are some reasonable inns in the downtown area around the Guanqian Street. You may have a try.
If you understand some Chinese and good at package tour, no need to have a guide since this city is far smaller than Shanghai. But, it is suggested that you hire a guide before visitng the gardens. Explanation is helpful for you to know the gardens' essence. At the gardens'entrance gate, there are lots of guides waiting for travelers~
Nice weekend!

hi ms jane, i am really greatfull for ur valuable information. may u tell me also about lake and some town along with canal. lake and canal town are alos near to each other or not. Moreoever, if possible ur advice about any cheap hotel near to these places if possible name of the hotel and rate. now i have changed my planned from this weekend to next weekend. take care