We are not obligated to finance people’s chumros. Period.
Beggars can’t be choosers.
Normal kosher food should be more than sufficient.
Beans, pasta, oil, spices, noodles, eggs, potatoes, onions, canned vegetables, fruits, etc. are more than enough to build meals from.
Limit meat to Shabbos chicken and yom tov.
Kosher cheeses are very expensive, sadly. Unless you go to Pic and Pay, where they have Sugar River (CRC) and Monsey Dairy (OK) for good prices.