I've not bought a commercial juice in about two years... although I've had several given to me I just put another order in with Wizard Labs AND Heartland Vapes... Heartland's Nicotine is cheaper, and so are most of their flavors (and they offer 16oz flavors, too), but they don't carry some of the flavors I regularly use, and Wizard does... That's my first flavor and Nicotine order in over a year! The only other things I've bought for mixing in the last year was some PG and VG gallons... because they were on sale... and a few plastic graduated cylinders and beakers to see if I liked them as well as glass ones... which I do! VG doesn't adhere to the sides of the cylinder, so less time is spent mixing and cleaning, lol
+1 on the mini-fridge! I have one in my office (the 3' tall, efficiency-apartment-size ones), and it is used only for my vape stuff and a few cans of cola in the door. I store my bulk VG and Nicotine in the chest-freezer, and bulk PG in the mini-fridge... trying to only keep a gallon of over-stock on hand, as I don't use that much PG these days. PG doesn't go bad as fast as VG, so there's no need to freeze it (IMO), because it has a room-temp shelf-life of at least 5-yrs, 10-yrs if kept cool and dark... and I've been using about a gallon every 2-years. I use about 3 gallons of VG in the same time-period?
I keep all my mixed juices and all my in-use PG/VG/Nicotine/Flavors in the mini-fridge. All of my mixing equipment is in the cabinet above the mini-fridge. It's all out of sight, but easy to get to if I want to mix a batch of something...
We're in need of more room in the house, so I'm in the process of moving my office out of the bedroom it is currently occupying, into an external 14x28 building I bought recently. It has a high-barn roof, 12x12 loft storage, and is un-finished inside... I'm planning to add a small bedroom and bath under the loft area, and turning the rest into a LR/office area with a wet-bar (for mixing drinks or mixing juices), etc. It can be my office... man-cave... guest-house... or for entertaining friends/family without having anyone tracking through the main house... at least that's the plan!