The most effective medications would probably be Actemra or Tyenne. Those are not approved for PMR in the US, but sometimes they are allowed in cases where prednisone isn't effective. If your insurance isn't approving Kevzara, I don't know if they would approve one of those, since they are biologic drugs like Kevzara.

Methotrexate is used a lot for PMR. It works well for some people, but the side effects bother others. I've seen leflunomide mentioned as a treatment, but I don't know anything about it.

You should be aware that Actemra/Tyenne and methotrexate can take up to 3 months to take full effect. If you stop taking prednisone on February 20th, you might be at risk of a flare before the new medication takes effect.

Another thought - have you looked into financial assistance to buy Kevzara yourself? Depending on your income, there are some programs that provide financial assistance.