That's possible. I'd be concerned about the maintenance of an EV fleet, including the cost of charging to traditional gas.
That last item is usually not a major concern for a business operation, as long as the vehicles are heavily used for a set period of time. One important limitation is that a company using EVs should always assume the vehicle has a residual value of $0 when it reaches the end of its useful life. Even if it’s running well after 5 years, it will be hard to sell it for much because the battery technology are few so rapidly that nobody will want the old one. A used EV is going to be like an old PC that companies can’t even donate to schools or non-profit organizations anymore.