Whatever about the person with arthritis, I would really be looking at getting a good policy for the cancer issue. 1300 ish a year will get you a policy but they will be very high excesses and low cover for everyday expenses. I recommend you look at Connect simplicity or Control 300 Create.
Both have quite decent day to day expense cover and there's is no shortfall on the Ortho with the Control 300 Create policy. They both cost around €1650.00 but The Control 300 Create is jumping up by around 300 euro from 1st Oct :-(
Look at the Laya website, it will give you differrent options to choose from.