You've just quoted yourself saying that a towball mounted rack will swing about the ball.
Please tell me exactly were I said this. I said it CAN if it's a cheap POS.
Relative cost? Depends on the Indy, half price maybe. Depends on convenience as well. My point was more that you will still have to pay someone to do the programming side (unless you are confident and have the tools) but I guess you abviously missed that blindingly obvious point as well.
Honestly, just give it a rest. No doubt you'll be back for the last word and a self congratulary pat, hope it was worth it.