What other kind of investment apart from housing can one take out >=5x leverage on an investment and have the interest tax-subsidized? Housing is a big racket

What other kind of investment apart from housing can one take out >=5x leverage on an investment and have the interest tax-subsidized? Housing is a big racket in the United States, and everyone is too afraid to say anything becuse they just spent the better part of a million dollars on a condo https://www.redfin.com/WA/Seattle/3610-1st-Ave-NW-98107/unit-B/home/69353943 https://www.redfin.com/WA/Seattle/3610-1st-Ave-NW-98107/unit... But if you make $300/yr and don't have kids or too many expenses thats like 5 years to pay off, so not too bad then? Not totally sustainable for the rest of the country and/or poor people though.