But a way to stem these increases is protest the valuations on all your properties every year.

Extremes bring out extremes. if starting wages are too low, get a different job or protest. 

They protest by "lying down"--doing the minimum to get enough money to work, which chips away at the bedrock of China's highly inefficient and manpower dependent economy.Dragging us back on topic, this is why Black Rock and assorting enterprises buying up huge swathes of real estate isn't some sort of signal that it's reassuring for ordinary people to be in real estate but rather a warning of the desired new regime post Great Reset. 

As of now, the tax rate is unknown, so your taxes are unknown.What you need to do is appeal/protest the assessed value.

just like our peaceful protesters LOL  looting  breaking windows  its simply a government problem no back bone. 

Allowing protestors to destroy government buildings is ok because freedom to protest is more important than stuff. 

I intend to register a protest with HUD to amend the practice.

The best thing to do is protest the increase after you purchase it.

You can protest by May 15th of next year to have a hearing to reduce 2022 taxes but if your purchase is not less than the tax value you have little chance of a reduction

Things they look are type of property, SQFT, age, B/B/garage, type of construction, land area, pools, etc. in general terms.However, expect taxes to go up, and if you feel the tax assessed value is unfair, you can always protest your taxes and discuss with the office and hopefully negotiate.