Captive Portal

Hello!

I'm setting up a captive portal for a hostel/student rooms. Some people will stay there for 1 day, some for 1 week, and some for half or whole year.

Since I don't have a change to setup radius server, I went with the following settings:
I set idle timeout to 3 days and hard limit to 0 so the permanent users(the ones who stay for long period) will be logged in all the time(well, whey will be logged out if they won't be active for 3 days, but that's rarely).
For the people, who will stay day/week I will provide vouchers.

Do you think this setup will work? If I understand correctly, when the voucher expires, monowall disconnects the user, right?
Is setting idle time to 3 days and hard limit to 0 ok? Or shoud I set hard timeout as well? There will be MAX 30 people online at the same time and the monowall PC is a P4.

Matej