I totally expect our portfolio to be insanely high in 30 years. I'll actually be pretty shocked if it isn't multi-millions in 10 years.
We FIREd ~95% success rate in CFIREsim/FIREcalc, likely could have done so earlier, but was still figuring out all the angles and learning about basic investing and money management/tax optimization to help make me much more confident in the decision. Finances and investing were not intuitive for me, and I had to start from scratch basically around 2012 when this became possible.
As far as health insurance, I live in a pretty large metro city and for two adults in their early 40s, we pay $240/month for a silver plan, but it is an EPO, which is basically a closed system health provider. Luckily, it is offered by a really cool non-profit health insurance group, and I was already familiar with the actual health provider system, having used it happily for decades in the past (and was bumped off of it by a change in work-provided insurance - I remember being pretty upset about losing them!).
The insurance company (being a non-profit) is very into keeping costs contained and keeping their clients informed. I don't see them pulling out of the market or attempting to raise their rates sky-high in the event the ACA implodes.
I can adjust our actual income easily, so I made sure to keep it under a certain threshold to get the cost-sharing benefits AND optimum subsidy. What this means is that in our case, our silver level plan actually has more perks than most gold plans - it's a platinum plated-silver. Zero deductible, all doc visits are $15, $15 lab work, max out of pocket is like $4K for family per year... lots of other really amazing things that I likely (hopefully) will not have to take advantage of, but are there if needed. Without the subsidy, we'd be paying ~$700/month for both of us, the deductible would go up to like $4K and max out of pocket up to $10K, with the other things like copays and such scaling upwards as well.
Still technically in our budget, but would be great if we could keep the same basic coverage for a bit less than that.