The adjective "psychotic" includes "hot" in the spelling.
(ii) "Her occupation was listed as a mobile airbrush tanning operator."
(A) The word "mobile" means that when various tanning salons called her for the service, she drove to the salon at issue. I imagine that a tanning salon has a customer for this service only occasionally, so there is no need for hire an operator on site (full- or part-time).
(B) Airbrush Tanning 101. thetanningstore.com, undated. https://thetanningstore.com/Airbrush-Tanning-101/
(C) dihydroxyacetone https://en.wikipedia.org/wiki/Dihydroxyacetone
(iii) Tempe, Arizona https://en.wikipedia.org/wiki/Tempe,_Arizona
(The city is named after the Vale of Tempe [a valley just beneath Mount Olympus; the valley was was celebrated by Greek poets as a favorite haunt of Apollo and the Muses] in Greece; is bordered by Phoenix and Guadalupe on the west, Scottsdale on the north [all within Maricopa County])