Do you smoke right now?
Do you know the wattage range you'll be using?
Lipo seems like a lot of cost and maintenance and I'm thinking battery life isn't super and maybe
@inspects will let us know about battery life between charges vs dual 18650/2x700.
Where can you buy from? Can you buy from China/Honk Kong? Link sites if your choices are limited.
If I read correctly, you have 120US for a setup? Just go with a good dual 18650 mod (nothing dual regulated 2x700 has caught my eye but there's a few out there) and there's a plethora of RTA's to suit your fancy, as well as squonkable RDA's (RSA) for which you could get a sqounk mod and I would suggest regulated.