The wrench in your plan is that it is currently taking a very long time (years in some cases) to approve the I-751 (removal of conditions). While the N-400 can be filed on the schedule you presented, the N-400 cannot be approved unless and until the 751 is also approved. So, in other words, the pending 751 may cause a delay in approval for the N-400. Sometimes they are adjudicated together, sometimes they are not. Hopefully, in a few years, this situation will improve.