Not to side track this thread too much but since Robert brought it up:
Personally I don't see the need to build that low or use 24ga on a regulated mod. the reason people started building lower was to get higher wattage out of mech mods. with voltage fixed between 3.5 & 4.2v you have to lower resistance on a mech mod to get to your higher wattage. Building lower you use less wire so you want a larger wire with less resistance to give you more surface area on your coil. Regulated mods take the need for low ohm thick wire away by allowing you to put higher ohm coils and run them at higher wattages as regulated mods boost the load from the battery to achieve the desired wattage. I'm no electrician, nor do I play one on TV, that's just my understanding of ohms law and how it relates to vaping.
If you are unsure about rebuilding, a smaller 20w mod would be a bit more portable. However the 50+w box mods usually carry 2 18650s, so even if you don't use the full wattage range you have twice as much battery life. The drawback to that is I haven't seen onboard charging for the dual 18650 mods, and I like to charge and vape

20w is plenty to get started rebuilding if you ever decide to try it, and at $40 for the device its half the price of most of the bigger guys. I haven't looked into 50w mods, so I'm not sure about those - may be worth a look!
Bear in mind with removable batteries you will have to purchase batteries separately for $8-10 each and a battery charger for around $20 (buy good quality authentic batteries/charger from reputable sellers: RTDVapes, Illumination Supply, Sun Vapers, and I'm sure there are others - not eBay or amazon unless you know the vendor.. there are a lot of clone batteries out there marketed as the real thing).