Exam HPE6-A49 topic 1 question 21 discussion

A retailer currently has two redundant ClearPass C2000 DL360 Gen9 hardware appliances and two perpetual 1K Access licenses. The customer uses ClearPass to authenticate employee wireless devices and other corporate wireless devices. ClearPass logs indicate that peak license usage is currently 1900.
The customer now wants to add a guest access solution. Guests will connect to an open SSID and redirected to a portal which they can use to self-register and log in. The customer anticipates that up to 1550 guest devices will connect at the same time.
The customer requires the most cost-effective solution that will meet the requirements. What should the network architect recommend for this solution?