Thought I would offer what I'm using for people who may need it. For reverse leg lifts and running man iM I just bought a $20 sawhorse at lowes and an $8 yoga mat from Walmart. Depending on choice of materials, total price is $20 - $35. I'm 6'1 with long legs and it's a good height for me. Just need to put it up on blocks in later progressions. And it's easy to move around out of the way. This fits in my bedroom and I don't need a power rack to do my leg lifts. Enjoy!
P.S. Might need to use a pillow on top of mat for extra cushioning if your weight crushes down on your abs too hard with this.