A 250 hour pilot with a CFI has a marketable skill.
A 250 hour pilot without a CFI, but 50 hours of multi time has little to sell, at least not as a multi-engine pilot. There aren't many jobs that are open to low time pilots; few of those in multi-engine airplanes.
Get teaching, build experience, and pick up a MEI in there to start gaining multi experience.
Light twins aren't becoming rare. Like the rest of aviation, however, they're becoming more expensive.
Get the multi rating out of the way early to enable one's self to take advantage of any logging opportunities that arise, and get multi experience when you can. Don't go into debt for a few, paltry hours of multi, especially at the expense of diving in with both feet to get total time experience. At the early stage in the game, it's about your total time more than your multi time.