Pulled into Target tonight and a damn tick was on my center consul. Keep in mind I am a city slicker...haven't been in the woods in my truck since last Friday.
Holy cow. I found a 32 ounce bottle of 36.8% permethrin on Amazon for just a tad over $23.
If my numbers are right, diluting that to .5% (pretty sure that's the EPA recommendation for this stuff, would have to dbl check) would yield 18.4 gallons. That's a lifetime supply x 5 right there.