You can still mount your Lifetime under your roof rack by using this K9 table mount. I use this under roof rack table mount to mount my Life under my Gamiviti roof rack.Another vote for the Lifetime 24" x 48" fold-in-half adjustable-height table.
It is definitely not perfect, but I've yet to find anything that competes on a dollar to performance basis.
I would dearly love one of the Frontrunner tables, as the pack-master in me loves the idea of storing the table under the roof rack, but spending 8.5x as much for a table that is 0.4" thinner just doesn't sound like good sense.
We've got one of those rolled up in the garage somewhere. We stopped bringing it after discovering the lazy beauty of the Walmart Field & Stream folders.....
My latest and maybe favorite so far, this kind of checks several boxes. It's big enough, high enough, rigid top, and packs in a long slender shape I can secure somewhere even though it's not small.
I've considered something similar.