The only necessity is that you own your house. Even if you have a mortgage you can have a refuge. Outside of that non-negotiable, you can have a refuge and I would strongly encourage you to have one in service to God and His people after the Warning. God wants people to be generous and trusting and have refuges. As Scripture says around 365 times, be not afraid. Jesus teaches us not to worry. As He revealed to St. Faustina, “Jesus, I trust in You.” Our God is a God of miracles, and He will be multiplying food, fuels, and any necessities. An angel will guard each refuge. So there is nothing to worry about. If you have five loaves and two fishes, build on that and He will do the rest. The refuge time is only a little over three years long. Then will be the Chastisement, from which all in refuges will be protected. And after that we will go into the Era of Peace promised by Our Lady of Fatima.
In this not-to-miss video, Fr. Michel, who has built a refuge as God directed him. He is an expert on refuges. (Contrary to popular opinion, he does indeed believe in the revelations to John Leary, which center on refuges, and the two are very good friends. In obedience to his bishop, Fr. Michel is not allowed to publicly support John Leary; that is all.)
Click here to watch this video, which includes a question-and-answer section: