I does cost a bit at the start but once you get going you’ll find that your still saving money compared to buying cigs or store bought juice.
If you find that you go down the deep rabbit hole of buying all the flavors just limit yourself and do good research prior to pulling the trigger.
For example… I built my shopping list 2 months ago and just sat on it. I made a few adjustments and between buying nic and flavors I only spent 150. But that 150 will last me for atleast 4 months. That’s only about 40/month.