@caracarn - What exactly are you trying to figure out?
Healthcare expenses is a moderate to high income problem in the US. If you can get to 250% or below of FPL, you qualify for both significantly reduced premiums through the ACA tax credit and cost sharing reductions. If you're above that amount, it's just a financial cost.
I can't navigate our income below that, so I budget the $8700/year for insurance premiums then another $6,000 - $8,000 for our out of pocket costs between stuff that insurance never intends on covering and the stuff it counts towards the deductible. You can readily get plans that are in the $6,500/person cap, so work with the premium and max out of pocket to figure out what to budget.
As others have pointed out, if you can manufacture your income high and low by alternating years, you can do better than budgeting $15,000/year.
Healthcare is expensive, the folks in other countries pay as they go with higher taxes for a decade or two while US Citizens keep more of their earnings but have to hit a bigger FIRE number to support that heatlhcare expense.
I also think those going without are taking a risk I can't stomach.