I bought one of those pump sprayers. It's entirely too slow! So unless you've more free time than most, I'd nix that idea.
With so many pots, you should look into automation. It's just not as hard as it may seem.
Before I had timers fertigating my tent, I had a simple on/off switch that would power up the feed pump. That way it's manual... I can watch it.. but my back isn't destroyed and my time is returned.
Wish you the best though.
Cheers
B
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