See there’s an issue you want a one size fits all that’s never going to happen
It's happened historically in several countries, whereas georgism has happened in a total of 0.
Well through public ridicule or at gunpoint I’d imagine
Great. Now, who are the people organizing and agitating the workers to gather the numbers and strength to do this at gunpoint? Hint: again, not the Georgists
Expropriation can be carried out without purchase, and it has been done in several countries to the great benefit of the workers. No need to pay for the housing of the landlords, we can just take it at gunpoint.
Who says the housing has to be centrally administered? Housing could absolutely be organized by local collectives in charge of the maintenance of the buildings after its construction, likely in the form of democratically elected councils. As an example, most access to housing in the USSR was through the work's union, not through the central government.
No, people should pay costs to maintain it. For example, rent in the USSR was about 3% of the monthly income. Seems much better than what I pay now!