While I like the idea of doing the math for such impactful decisions, it's probably not that easy to get correct constants/values to do it so you get meaningful

While I like the idea of doing the math for such impactful decisions, it's probably not that easy to get correct constants/values to do it so you get meaningful numbers. For example in Austria (europe) renting prices went up ~25% in the last 4 years or so, so the 2% inflation correction (per year) the author assumes is probably wrong for many countries/cities. At the same time rent (in Austria) includes several cost factors such as water supply, garbage, insurances for the house,... whereas the cost of your house's mortgage does not. What I'm saying is: If you do the math it only makes sense to do it in such a detailed way that you get meaningful results.