I recommend the http://www.rest-timer.com Great for making the workout more interesting and helps to reinvigorate you. Good stuff. and cheap too.

This company called Goodtech has develped this product called the Wristband Rest Interval timer. It is awesome. It is all preset and preprogrammed for the optimal rest period between sets. Only one press is required. Check it out... at http://www.rest-timer.com Good workout to everyone! Best regards...

If they have support beams in there homes it'll be very easy, or you can get the door anchor. In takes very little time to set up, especially once you get used to it. If your customer wants to purchase their own TRX they can get the wall mount at the same time, it requires some DIY, but can make...