Have you looked into Resource Governor?

Chapter 1: Limiting Access to Server Resources

The description from the docs:

Resource limits

A resource limit is a set
of parameters specified by a system administrator to prevent queries
and transactions from individual logins or applications from monopolizing
server resources.

Resource limits are bound to time ranges, allowing the system administrator
to define precisely when they should be enforced. When the system
administrator modifies a resource limit, all users logged in see
the change, including the system administrator

The set of parameters
for a resource limit includes the time of day to enforce the limit
and the type of action to take. For example, you can prevent huge reports
from running during critical times of the day, or kill a session
whose query produces unwanted

Chris