@BudBuddy @Ray4x I think when you look at the dynagrow and gh lines they both come in around the best bang for your buck range.
After the base nutes, all of the additional bottles come in at different times and places. Bloom boosters and sweeteners usually aren’t necessarily for the survival of a plant. But the cal/mag could be. There are also ways to supplement some of these with household items.
And there’s not an issue with mixing lines from different manufacturers, as long as you’re somewhat aware of what one line contains vs the other. For example, adding a botanicare or advanced silica enhancer to gh base nutes shouldn’t be an issue. But mixing the grow nutes from one with the bloom nutes from another may.
I always found it best to try and get something fairly solid with base nutes first. Unless you’re using hard water, some sort of cal/mag will probably be a necessity. After that, you can kind of plug them in as wanted or needed. For a lot of the additional nutes, even a couple of small doses at the right point of a grow can make a pretty big difference. So while the bottle may be expensive, it could potentially go a long way or have a big impact on your harvest.