It is really hard to beat a Mega Crop grow for Minimal expenses! I've seen other growers have simply outstanding results!BioTabs use looks costly. A near $100 (Amazon US) starter kit with 10 tabs and the other supplements claims to cover 5-10 plants. But with 5 gallon pots even using just 2/pot (low end of what's recommended for this volume) that will handle (will it?) 5 pots at $20/pot or plant. I generally grow 8-9 plants per grow, so that I'd need to spend near $200 just for feed for a single grow. [I currently feeding MegaCrop 2-part, the cost of which is trivial in comparison].
I've been tempted to do a pop 22 Style grow with MC single. 550 PPM every watering 6.8 to 6.3 PH. Alternate between Root Wise and Recharge.
My very first grow used something very similar and had outstanding results. Especially for a first grow. I bet it would be even better with the RO water I'm using now. I think I would get more nutrients per feeding.