Welcome!
If you're planning on using the
Tank Transfer Method (which I would recommend, myself), then you'll need two of everything you plan on using during the TTM cycle (which can be pretty minimal). You'll also want to keep it as small as you can reasonably get away with in order to minimize water usage and cleaning effort. Once you are out of the TTM phase, it's convenient to have more robust QT tools on-hand to make the last 14+days easier to manage.
Here's my setup:
2x 10gal tanks
2x
Hydor PICO powerheads
2x
50W heaters (w/ temp adjustment - you can likely find cheaper; which is fine - just make sure they temp adjust)
2x
Temp probes
4x Large PVC Junctions (
example; make sure to get the heavier ones so they sink)
2x
Ammonia Alert badges
1x
Turkey baster (for sucking up extra food, detritus, etc.)
1x
Strainer (easier/safer than a net)
Once I'm out of the TTM phase, I add a HOB filter to the final tank. I used to add a spare light that I got on sale, but I don't really bother any more as the tank gets enough light as-is.
For myself, I also made sure to have a spare of anything I
might put in my QT tank. I get distracted easily and don't want to use something in a QT and then dip it into the DT on accident...
Make sure that whatever setup you get, it can be located at least 10ft+ away from your main tank in order to prevent aerosol transmission.
Again; welcome to R2R!