You're talking about a rented property Sandgrounder. It's different if you plan to buy property. This is taken from
www.swisspropertyguide.com website under their legal restrictions section:
Non-Swiss may only buy one property of maximum 200 square metres of liveable space per family: a family is defined as husband and wife and / or under-age children. Over the age of 20, the son or daughter of an owner may purchase one property in his/her own name, provided he/she can prove his/her financial independence.
That's why I'm not sure if ForzaLugano could purchase the property he's looking at. As he wants to live in one of the apartments, and if the floor space is under 200sqm, he might be able to, but he needs to check further.
Why you can rent a larger property than buy one I don't know.