"reeled in really slow" .... that, combined with the lighter weight jig, was likely the biggest factor in your catching success.
Not knowing how you experienced or detected bites when using the heavier jigs, I would "guess" that you "felt" the hit. A lot of times, using the lighter jigs, you "see" the hit (line movement) more often than feeling it. I prefer to "see" the hit, myself, when casting jigs ... which is a big reason I use hi-vis line.
Personally speaking ... if you have a small collection of marabou hair jigs, some slider/boot tail type plastics, solid body tubes, and stinger shad type bodies ... along with the lighter jig heads (& maybe even add some weedless heads) ... then you've got enough options to be in the game, under most conditions.
If the "finance officer" likes to eat fish, and you start bringing home the goods, explain to her that the newest purchases are the reason for the increase in your success ... and that an increase in your budgetary allotment would likely continue that success, if not increase it.