First, we are buying our tickets at the airport. Spirit charges a $16.99 surcharge per ticket for each one-way ticket you purchase online. Two $16.99 charges for four people comes to $135.92. Well over the cost in gas and parking we will have to pay to drive to the airport to get our tickets.
Unlike the use of free weights or machines, TRX Suspension Training allows a series of movements to be performed in multiple planes without danger of hyper-extension or injury.
The TRX (or any suspension trainer for that matter) is designed as a stand-alone piece of workout equipment. You shouldn't need anything beyond the straps and a solid anchor point about 7 feet off the ground (squat racks, door jams and tree limbs all work great for this).