Of course it's possible; if things go your way and you alone know if flying once a week is enough for you to retain everything from the week before and then build upon it.
Most people, however, will find that it just needs continuity............each day, not each week, to stand a hope in hells chance of passing.
If you're looking at keeping costs down to a minimum as well, and you're not the sort of person who can thrive on one flight a week, then the choice is simple; Wait 'til the time is right (work wise and flying wise), leave the job and dive in head first, AND PASS IT AS SOON AS POSSIBLE.
Your choice, nobody else can make it for you, you alone know what's best and what you need to do it.
Good luck
PP