The ADA messed up by not specifying allowed existing buildings have to have a 30 year plan in place to become accessible, with a requirement that if they put this off they place into escrow that years part. (I'm not sure how to write this, but essentially either upgrade 1/30 of your buildings each year, or place in third partt escrow that money). If you own a building you need to do a major remodel every 30 years anyway just to keep it safe and in good shape so for landlords keeping their property up this isn't really much different than what they would do anyway)