>>60592934if you are buying a place to live for the long term, yes you should buy.
You are correct that the blips don't matter. You should gain a lot of equity over 20 years, but it could also get eaten up by real estate taxes and repairs (who knows??)
The main thing is, your mortgage will stay the same throughout, so like you rent now for $1600 and buy for $2000/month
Rent goes up 5% a year so in 5 years, you have no equity and are paying more than $2000/month, but your mortgage stays at $2000 (insurance and taxes may go up, but mortgage stays the same)
After 10 years, as a renter, you still have no equity, but are paying $2600/month rent
After 20 years, you are paying $4250/month in rent and have no equity. but by buying, you are probably only paying $2500/mo including insurance and taxes and have somewhere between $250,000 and $800,000 in equity.