re: Percentage of net worth "invested" as equity in your primary residence?

A house is a place to live.

Nothing wrong with buying a house, but I do not advise counting on it an an "investment".

Of course, people do make money buying and selling houses, but the big money is made from timing. If you have to move, you could lose big.

All that being said, I own my house. I paid 20% down and have refinanced twice in 8 years.

If you buy a house, pay 20% down so you do not have PMI.