Reddit reviews Remington Industries 40SNSP 40 AWG Magnet Wire, Enameled Copper Wire, 1.0 lb, 0.0034" Diameter, 33217' Length, Natural

Honest question here but it might sound a little ridiculous at first... Does it actually have to be wireless? Why not use a thin piece of disposable wire as an antenna that unspools behind the rover as it moves and conducts the wifi signal through it? Something like this 40 gauge copper wire that is over 33,000 ft long and weighs about a pound: https://www.amazon.com/dp/B0082CV1KQ/ref=cm_sw_r_em_apa_i_a8wWDbESQ8FTT

They also sell in 40AWG too. Used it an old job to solder opamps to piezoelectric sensors. It's thinner than hair and not nearly as strong either