I don't think keeping it charged would be too much of an issue since I spend 12 to 14 hours a day in a truck mainly just looking for a very good quality setup. Also something I can throw in my pocket when I hop out of the truck and not worry about breaking it. Would I need to remove the tank on most of these when I do put it in my pocket? Also any other setups anyone would suggest? looking to not really go over 100.00 us dollars on the setup. Now juice is a different story lol I see some cash going out playing with all the flavors they have out there.
If you like the box mods then spend a little more and go with a VTR, another Innokin product. I have a VTR, MVP V2, and a SVD...the VTR is by far my favorite. When you say "pocket" are you talking shirt or pants?? The VTR would be too heavy for a shirt pocket. Some people see the weight as a bad thing, me personally I like a heavier mod. The way the VTR is set up just about any 19mm tank fits on the side not the top like most, making it shorter and more pants pocket friendly. Plus the tank is somewhat protected by the VTR's design, it would be almost impossible to snap the tank off. It's going to be a little over the price range you want to spend after you buy a battery(s) and a charger. The up side is that when the battery finally quits you replace the battery only($15) and not the whole mod like the VV or MVP. Hope this helps and good luck on finding what suits YOU the best.

Keep Calm and Vape On