Fair enough. You should have plenty of time subscribing to Qbank for the 3 months prior to your Step 1. The other question sources you can keep an eye out for (which are available online for the most part 😉 ) are IV Qbank, Board Simulator Series, Kaplan Qbook, Robbins Review of Pathology question book, NMS, Webpath, Appleton & Lange, and First Aid has a new Q&A book coming out soon. There is also a series of books called PreTest that covers each subject individually and is supposed to be alright for review, though not in the clinical vignette format found in Step 1.
Between all of these options, and the other online question banks like USMLERx and USMLEWorld you shouldn't have the problem of running out of questions. Motivation might be another issue, though.