I've been wanting to try a TRX system at home for a while now because I tried it with trainer at a gym and it was such a great workout. It's pretty expensive, but I got to thinking how the straps we have for moving heavy furniture look very similar to the TRX straps. And DH already has a pull up bar installed in a doorway. So I wrapped one of the straps around the bar a couple times in the center of the strap so now I can actually use the two handles like a TRX system. A pull up bar is probably around $20 and the straps are around $15 on Amazon. SOOOO much cheaper than buying a TRX kit, which is on Amazon right now for $160, normally $220.
link for moving straps on Amazon

Just thought I'd share!