for boots that has good insoles, i have to suggest Altama and Belleville hot weather boots, it has silicone insoles for load bearing missions but the down side, it is pretty much has almost zero ankle support, apart from the Belleville 300 ST, these boots has leather panels, which has better support, unlike the the Altama, which is just cordura canvas instead. my current boots that i am rocking are the Belleville 300 ST, CF MK5 and the newest pair i need to test New Balance/OTB Bushmaster, which seems to have good support

check ebay, since your budget is under 100 or go surplus and find a pair of CF MK5, however what style you like, i found a pair of MK5 for 50 dollars and with a good amount of vibram traction still on it, or even check lapolice gear for clearance deals