How much time to get 3 tests a week on User Testing? (UK)

I appreciate this is question depends a lot on demographics, timing and rating etc, but once up and running with a decent reputation is it possible to get an average of 3 tests a week? If it is, how much time do you think I need to be on the dashboard for? I’m in the UK so that probably effects which tests I qualify for.

Any advice or tips to minimize that time would be appreciated. Thanks