First and before you plan to attend ICC 2017 conference, you need to check with your country if you need to get a visa to enter United KIngdom or not. please follow this link to check if you need visa or not.
There are many hotels cheap and not expensive near our conference venue for example:
Accommodation Circus Drive, according to Booking it is far away from university of Cambridge about 3.3 KM. the cost per night is about 49 Euro
The best way is to check with the website Booking and enter your dates, sure you will found many hotels.