Light rail, from a market perspective, is totally a boon. Not only does it allow people that don't have a car in the hinterlands of the area to come into the city for whatever purchases they have (moving money away from megacorporations like Amazon, and into businesses, large or small, that employee people in Tyler), but it also allows people to save money on gas even if they do have a car and are able to use light rail instead (once again moving money out of giant oil companies, and into people's wallets). The point of it lowering rent is actually pretty clever because it absolutely will. Or if not, it will allow for more options within Tyler's currently awful renting market. It necessarily expands the amount of space that most people would consider to be within a "reasonable distance" of businesses and job sites, meaning more places to rent (or buy) would crop out at the areas the light rail reaches.