It sounds like you have a good first step plan. My insurance is similar in that is does cover some out of PPO and my Lyme doc is covered with the 80% - she bills the insurance.
The Western Blot test was expensive $395 or something like that. I did put it on my credit card but insurance BC/BS did reimburse me for 80% of that. It was worth it for me since it confirmed that I did have Lyme. I don't see my doctor too often once I got started on the antibiotics -- maybe every 6 weeks. I am just taking pills -- so it's just ride the wave of treatment -- cope.
These forums have been very helpful to me.
The big hurdle for most people seems to be getting a diagnosis and then getting in to see a LLMD.
I know I am better after three months on antibiotics, but I have a few more months to go. My meds are partially paid for, but the ones I am on are not expensive.
I am reassured by friends who have had this that there is life after Lyme -- people do get better, although some, of course, have a rougher, longer time. A few, I've heard, will need ongoing treatment for years.
I am hopeful. It was exciting to me to think that all these symptoms I had might actually go away.