I like hitting up the restaurant for cash since the prize money lasts the whole duration (adds about 110k to the 3* run). Dunno if there's something better out there, still need tons of money for the Lum boutique.
Anyway, just EV trained some temporary guys for the Battle Maison, it's crazy how much faster the horde battles are over the Super Training. I had 3 guys go from 0 to max in about an hour. Good stuff.