I also have TNBC no lyph node involvement, but very agressive, grade 3 and stage 1. I had a mastectomy and 3 X FEC and 3 X Docetaxel. The Docetaxel was difficult, but I have now finished chemo and going in to hosital tomorrow, to have the right breast removed and having spacers put in ready for implants in 3 months. I finished chemo in April this year.
Listen to your oncologist, I went private, my medication cost no more than $500 and I only ever paid about $70 out of pocket for oncologist visits prior to each chemo. The tests leading up to the operation, scans and MIR were a bit more costly but nothing like the $10k you mentioned.
My oncologist also wanted to hit me hard with chemo but also told me TNBC responds well to chemo, I am glad I followed his advice and I am looking forward to the rest of my life, cancer free.
All the best