OK. So let's design a test framework that looks something like:

Test 1:

-3 testers

-setup at home individual

-install test

-report bugs

-meetup for offline, then online test

-test distances offline

-Approx time: 2hrs

-Budget 100k sats (zapped to testers after completion)

Test 2:

-5 testers

-same as before, but more people, more scenarios

-Approx time: 2hrs

-Budget 200k sats (zapped to testers after completion)

Test 3:

-5 testers

...

...

-Approx time: 2hrs

-Budget 200k sats (zapped to testers after completion)

Test 4:

-10 testers

...

...

-Approx time: 2hrs

-Budget 400k sats (zapped to testers after completion)

...This is just a rough approximation. You know better what needs to be tested. Please correct me or add detail where necessary.