Firstly, the only method worth relying-on for getting accurate mite numbers, is an alcohol wash (or there’s a similar method using washing-up liquid)
Whatever you do, is only going to be worth doing in one of the following circumstances:
1) you have lots of colonies spread over a wide area, enough that you are controlling the genetics of the local drone population
2) you are away from anyone else (like 5+ miles in any direction)
Or 3) Everyone else around you is doing the same as you.
There is no point being the only treatment-free beek surrounded by people who treat, nor is it much use being the only person to treat surrounded by lots of untreated colonies.
This is because of both genetic pressure screwing-up any mite-resistant traits you may encounter, and also mite infection between colonies: nobody wants their treated colony to easily get more mites and the diseases they carry, and nobody with a treatment-free regime wants what mites they have to be the double-hard mofo mites that have survived everyone else’s treatments.
I would get involved in your local association, find out what people are doing there and do the same (which will likely be to treat)
Either way, successful treatment-free keeping is going to need knowledge and experience that you don’t yet have imo.