Here's my thoughts....
No, it's so much bloody work getting the TI onto the roof, especially single handed. I used my T loader only once, and thought this is ridiculous and never again. At such high risk of damaging your car plus all the salt water dribbling down.
I went from this
It took ~20 minutes to get onto the roof and longer to get off and assemble. Also the overhand was too long for my vehicle to be legal in Australia.
Within a month I found this on ebay:
Had some welders add second layer and then I painted it with hammertone:
It takes 2 minutes to get off the trailer and on the trailer. I don't dunk my trailer, I simply drag on/off. I sold all my Rhino Rack Kayak bits on ebay to the next poor sucker (mind you it probably suits a single small hull kayak very well).
I understand the attraction to not having a trailer, I have no storage for one and have to pay for a local facility to store my TI and trailer.