First thing, it's good you are thinking GFCI for your safety and others.Yeah I might slow down a bit. I'm going to concentrate on what I need for that initial cycling process. Got some Dr Tim's One and Only. Just discovered Hannah Checkers. Might return that API testing kit. Not sure if I'm overthinking it but I'm not sure whether I should put the stand in front of my power outlet, which I'm planning on swapping out for a gfci. What if I need to work on that outlet for whatever reason? I'm even wondering if I should put the stand on top of a mat? I have engineered wood floors which isn't completely water proof.
One thing I would consider putting a tiny bit of your spending toward is a Ground Probe.
Here is why. I made this video after almost getting a good ZAP from my tank.
I can also tell you this, that GFCI outlets don't last forever. I've had 3 over last 10 years go dead and wouldn't reset anymore, so they had to be replaced. If you put your stand in front of the GFCI it will be a challenge if not impossible to replace and maybe even a bit tricky to push that Fault Reset button after a False/Real trip.
All the best. Sounds like you are a forward thinker, and that's a good skill to have in this hobby.
Aticipate the unexpected and design your setup to handle mishaps, accidents and equipment failures (which will happen over time), without damage to your setup, yourself and your residence.
Personally I like Salifert Test kits. Been around for years. Reliable and less expensive.
The only two hanna testers I think are worth buying are the Alk and Phosphate.