Prioritize. Health insurance is important. You'll need it one day. You could probably get away with training without it for a while, but in a contact sport like bjj/judo/wrestling/mma you will inevitably get hurt. It's just a matter of time. It may take a few years, but it will happen. Most grapplers who have trained for 5 or more years have had at least one 'serious' injury requiring a trip to an ER, an orthopedist, and possibly a date with the knife. If you think you'll be able to get insured in the near future, then your risk of getting burned is pretty low. But if you plan on training consistently without insurance for the long haul, well, you're probably going to regret it.