Using an R201p as an AP to utilise the Guest Access Portal

Hi all, is the above possible? We have a fixed wireless network on a static home park which doesn’t lend itself to a WiFi solution. We would look to install the customer as normal (radio installed on customer premise then connected to R201p) but then add the router to the guest access portal to enable the customer to pay for their connection as and when they want.
I have looked high and low for a solution that doesn’t involve installing separate WiFi equipment as we won’t have enough coverage.
Any advice/help would be appreciated.