Couldn't you just use a pair of LATHTs that are mobile, able to cripple engines, and focus fire infantry squads to hell?
Actually, pak36 has far better DPS than the LATHT, but yeah the light LATHT can pwn infantry and can chase down a tank for treadbreak.
And pak36 has better durability, easier to kill the latht than to decrew the pak36.
But I think treadbreak should be cheaper on the pak36, its not mobile like the LATHT, so its way harder to get a shot off on a tank, and if you do it will most likely be a frontal, meaning temporary instead of permanent.