1. Get a couple of simple 3.7 volt APVs that take either 18650 or 14500 cells, and stick with that format.
2. Stay with the 510 connector system as that saves you money.
3. Find a head type you like, from a vendor that sells products that last. Doesn't matter if it's 510 atties or clearos or whatever. Rebuildable clearos are a win if money is tight. For some people a 510 atty will last them months, so if you're one of them, this route is a good one - the secret is to have several of them and rotate them. If you cane an atty it probably won't last; but if you treat them carefully (no dry burns) and above all rotate them in use, they can easily last 6 months if of good quality in the first place. However if you're one of those for whom atties die fast, then rebuildable clearos may be better. RTA's are a win if you can afford to buy one in the first place, and if you like the vape.
4. The biggest savings of all come with DIY liquid. You'll save more here than anywhere else. If you truly are broke then here is the way to go:
- Buy 100ml (or more) of 100mg PG, and the same in VG.
- Buy 500ml of zero-nic PG and the same in VG, for mixing.
- Buy flavorings you like that are easy to mix and that fit well with other flavors, such as different caramels, vanilla, coffee, tobaccos.
- Get loads of 5ml and 10ml dropper bottles, a couple of pipettes, and some syringes with thick/medium/thin needles. The blunt-end type are best.
Always make a new mix recipe with 2ml at first, until you are sure it's going to work for you. After that do 5ml and write the recipe down. Making 10ml of something is a sure way to throw money away.
These materials will allow you to vape really cheap. If times are hard, you don't need a lot of flavoring in there, just enough to notice. It might also be better for your lungs.
If you see a good offer on bulk unflavored base nic liquid, get it, as long as you think you are OK with that brand. For example a 500ml bottle of high-strength base is normally an excellent deal. Then split it into 100ml glass bottles, double bag them, mark them clearly, and put them in the freezer (maybe in an empty ice cream box, just remember to label the lid) - they can last 5 years in a freezer, and some say a decade.
There is no need to spend a fortune on vaping if you're broke. When the money comes in, you can splash out again. Until then you can vape for pennies a day if you are prepared to plan well and spend a little in advance.