wow really? 3-5 ml per day is quite a bit.. and it's possibly going to end up costing more than regular analogs (unless you consider paying for your medical bills later down the road).
im just starting out.. but i'm thinking i should be at 2 ml/day or less.
smoking analogs, i probably do 1 pack every 3 days.. so that's about 10 packs @ $5.75.. so $57.50 on cigaretes each month.
Sounds like you are a light smoker if a pack lasts you 3 days. You might have luck using only 2ml a day.
As for the price, with DIY I make juice at about $.28 per ML so that's about a dollar a day. It's pretty good considering I used to spend about $130 a month on cigarettes.