Hi, here is my build based on Kayoumini frame by KayouFrames, it's a 2.5inch with a 5inch shape !

The assembly is incredibly simple and doesn't require many components, flying this quad feels like flying a smaller 5inch and that's awesome.

It's powered with lipos 2s, with AIO Happymodel X12 (ELRS + VTX 400mw) and 1103 8000kv Sparkhobby motors (aliexpress motors btw but its cheap and strong).
I don't think this motors exist any more, but Amax and TMotor make good 1103 motors.
The complete build costs between $150 and $200 !

The Orqa FPV One Pilot combo, with Radiomaster Pocket and Kayoumini is really cool to fly on some smaller spots and avoid scaring people.
It all fits into a bag, so it's very practical!

Here are some videos :