I like this build, simple, cheap, and usable. I had to watch it 3 times to get the parts list:
Roughly its:
1 6 foot iron pipe $10
3-5 husky hang all straps $20
bunch of zip ties $5
3-5 steel o rings $10
3-5 steel s rings $10
3-5 steel carberners $15
Author says it costs about $60 in parts. I get about $70 for 3 bikes if I go to Home Depot.