Shuttle Quote needed

I am looking for a van or shutlle (most inexpensive option) to transport guests between the 4 Points Sheraton in Plainview to the Woodlands in Woodbury (2 miles tops). We would have probably 50-60 ppl but could make 2 trips since the places are so close.
I would need the shuttle from 6pm-7pm, then from 12m-1am. Thanks!