Radon testing. Charcoal Canisters or CM?

I currently offer charcoal canaster radon testing. The issue is I have to wait an extra day to get the results and I do not get the results until after 4 PM. Its not that big of a deal, except the occasional client/ realtor that wants the results as soon as you pick it up.

So to kinda solve that I was considering switching labs or continuous monitors.

Any recommendation for labs?

I know I would need multiple monitors with how often i test.
For those who do have continuous monitors do you buy or lease and how many? If you own, what monitor do you have?

Inform the realtors that want the immediate results that there is a $50 surcharge for CRM use. They will stop their ******** real quick when they find it costs more!