I don’t think most companies would want to pay the initial investment on the treadmills. Low end models that suck are $5000.00. Good ones that would comfortable for long periods of use cost $7500-9500 or more. And shipping is over $500 per unit, though I suppose discounts would be available for buying a mass quantity. And then the cost of a contractor / electrician to set it up to feed electricity into your buildings power grid. And maintenance cost on treadmills that are constantly used can be pretty expensive.