I have been using good old soluble garden ferilizer in my DWC and coco for more than a year now and there in no discernible difference from the maxi grow/bloom I used to pay a lot more for.
I have been using a product called Thrive, wich is probably only sold here in OZ, but there will be something very similar wherever in the world you are. This cost me $9 a KG. Cheap.
If you are going organic, then manure, blood and bone, and guano.
I use this at 1.94 g per litre of water.
I also add some Fulvic and Humic acid, and some kelp extract, mostly during flower time
These guys have an awesome selection of good value organic fert and supplements.
Again you may not be able to get these where you are, but there will be similar and these are all pretty cheap. I have used their triple ten in soil with great results.