Wow. A 4x8 trailer is about 1/2 the cost and you can carry lumber, couches, appliances, mulch, with it to. Tons of uses. Harbor Freight has a folding version if space is an issue. Various registration and inspection required depending on the locality. Mine is $10 for a permanent plate and nothing else required if under 2000 GVWR. I'd guess overall it would be quicker to hook up a trailer and put five bikes in it than to put those racks on and secure 5 bikes to it. I have a few various sized utility trailers but never used them for bikes. If I had to carry more than 3 I would.