I will do anything to end homelessness except build more homes (2018)

Those figures aren't useful without more background information. For example, 88% of California jurisdictions have a minimum lot size of 5,000 sq ft (which sounds small to me, so that's a good thing?). For the 5,000 sq ft to be a limitation California would need a lot of inner city jurisdictions. In US and Australian suburbia a 5,000 sq ft lot is small, and there is lots of land outside of the cities. On the other hand, if we are talking high density inner-city housing whether everything is accessible via public transport then 5,000 sq ft is far too large as you say. It would not fly in a European city. But most of California isn't like that, so the 88% sounds fine.

And two parking spots per single family home sounds in line with a California household having close to 2 cars. Again, 2 cars is overkill in the city, but in suburbs with both parents working it's almost a necessity.

Your final point has no figures to back it up at all.

While TV's, AC, plantation blinds, stone bench tops, multiple shower roses, 2 dish washers, plumbed in fridge, and so on each don't add much individually the a modern house today is downright opulent compared to the one I grew up in decades ago. Add that to them doubling in floor area per person housed, and you get to the real reason why costs have more than doubled.

All of that follows from one thing - only rich people have the money to build homes, and they build homes rich people like. Those houses are big. They sit on large green lots. They are fenced. They can garage at least 2 cars. They are expensive, and they want similar houses around them, so they, the people who live there, petition for laws like the ones you mention. And they get them, reasonably enough.

To me it looks like you're blaming the government for delivering what the constituents asked for. Blaming a democratically elected government for passing laws the majority wants isn't going to stop the majority from re-electing them next year. You need to do something more constructive - like come up with reasons why it's in everyones interest (rich and poor alike) to ensure a single mother with 2 can be housed, and them work on solutions for that.

This infatuation in the USA for blaming the government they elected for all their woes is downright odd. Blame generally doesn't get you very far.