QT tank stocking?

I was planning on buying a lot of fish at petcos upcoming sale on the 22nd, and was wondering how many fish I could qt in a barebones 10g tank. Probobly getting giant danios, pictus catfish and tiger barbs, and have 2 10g tanks to work with. They're going into my 125 eventually, but with such a large influx of fish I want to make sure they're not going to kill off everyone.

I'm considering getting a couple pictus, 5-10 GD's, and 5-10 tiger barbs depending on their size. Filtration is going to be interesting because all of my filters would turn the tank into a whirlpool except for a few aqueon 20s I have laying around. Definitely can get daily water changes if needed though.

Do you think I would be able to swing this in 1 or 2 10 gallons? How long should I QT for? I usually just left the fish in QT tanks for a month but that might not be ok given the stocking.

My plan was to run the filters on my 125 for a little bit, or maybe stuff the media into my canister filter for a week or so. The diy sponge filters are tempting, but it's a rabbit hole I dont want to go down, especially when this is (hopefully) the last fish the tank will see for a few years. Dont want to put time into a tank thats just going to be taken down afterwards

The 125 has been running as is for months aside from water changes, and has been cycled for a year or two. The 10 gallons aren't cycled yet, planning on starting that today.

thanks for the help guys, stuffed some of the media for the filters into my canister on the 125, can't wait for this weekend :FIREdevil:

Well despite setting up the qt I ended up missing the sale. On the bright side I can let the filter media for the tank collect more BB in my canister. Im considering leaving media for the qt tank in my canister at all times, that way I can just pop it out when needed. Seems relatively straightforward to me, just wanted to double check with y'all in case its a really bad idea.