Is that game sold anywhere or are there instuctions on how to somehow make it myself? (Maybe by simply modifiying the monopoly rules?)

I think last time I searched I had found some very expensive and old original versions of the game on ebay

Edit: I found those two sites, the first seems to give really lots details (helpful if you want to know how to play it and how to make it), while the seconds seems to sell it (though currently doesnt):

• https://landlordsgame.info/
• https://landlords-game.com/