The Arlington Entertainment District has very few rooms within walking distance of the stadium, and the ones that exist surge hardest. That pushes most multi-night visitors toward Dallas proper anyway, where furnished corporate apartments sit near DART rail. You ride to the bus bridge instead of pre-paying $125 to $500 for FIFA JustPark, and you get a kitchen so you are not buying every meal out across a five-week tournament.
Corporate housing is built for exactly this: a 30-day minimum, fully furnished, utilities and internet bundled, no furniture to buy, and a real lease rather than a host who can cancel when prices climb. Families get bedrooms instead of stacked hotel rooms. Groups split one apartment. Remote workers get a desk and fiber between matchdays. It is the bottom-of-funnel answer the nightly-rate sites do not give you.