Okay going by October schedule (may have been different in August) there is a direct flight from Salt Lake City to Tampa on Delta - one each day. Currently costs around $490 for a return flight a few days away.
I priced it a couple weeks ago and it was much cheaper than that. Maybe around $290. Compared to the monthly cost of a storage unit it would pay for its self after 3 months. If they were thinking about continuing their vanlife beyond the end of the planned trip in October it would make since to fly home and close it out. But i have yet to see anything concrete that shows he flew home or even went home at all.