@Starsky, I think you misread intercst's article. He wasn't advocating for renting over buying - he mentions later that he did buy a house in Portland later. He was advocating - I think - for doing whichever made more sense at the time and in that place. Thus his reference to the article on the 5% rule, which I had not come across before and didn't examine closely (having a paid off home and not interested in moving, I don't have a dog in that fight currently) but seemed reasonable on the surface.
His second point about opportunistic travel is anti-inflationary in the sense that if you go when the deals are (which you can afford to when FIREd), you can pay less. Maybe you'd argue that's not anti-inflationary, but if travel is something one has as a percentage of their budget, and one can pay less over time by going when demand is lowest, that's a strategy for paying less over time, which lowers one's personal rate of inflation.
His last point about the ACA and healthcare is also indirect. I think his point was that he thought he would have $20K per year premiums, and if you inflate $20K at 5% a year, that's $1K of healthcare inflation. Obviously paying $1.43 a month or whatever his number was means he's not experiencing $1K of healthcare inflation a year, so it's again not a technique or a strategy but just an observation that healthcare inflation for him is not what people expected or feared.
@RB, I think you're right that he wasn't explicit about the connection with battling inflation on any of his three points. His first method of renting for a long time, I think his point was that it is possible that housing can be more of a fixed cost than an inflationary cost - no particular technique or strategy, just an observation that housing isn't always that inflationary, particularly if one is adept and makes good choices between renting and buying.