Sounds expensive.
If I were in your shoes, I would probably go the easy version of mixing: buy vg, buy pg, buy some nicotine base, then buy pre-made concentrates from well known juice brands. Took me less than an hour to figure out the idea behind it, really not that hard. Only reason I've not started down that route is because I'm not currently in a country where I can access the supplies. Next trip to UK, and I'll be there!
Alternatively get good at keeping an eye out for discount codes and special offers and buy good quality juice when it's on offer. There are a few bargains to be had right now if you look through the forums.
Just a thought, I started going through juice heavily when I started sub-ohming. I then decided to increase the ohms in order to conserve my juice supplies! Any mileage to that idea?
But to answer your question as directly as possible, some of the drip drop range, dripworx, chuff stuff, aerovape are all vendors that have been favourably reviewed and have very good prices.