It's almost like most people, at least in NA/EU, play for reasons other than crafting.
The house doesn't actually belong to you. Your character may be listed as the owner for game purposes but you don't truly own it. It is owned by Square Enix. along with everything else in the game. You're allowed continued use of it at their discretion and contingent on your compliance with their terms and conditions. Part of those terms and conditions include maintaining an active subscription so you can enter the house at least once every 45 days.
If it's not worth that 13 Euros a month to you, why do you want to keep it so badly? You would be smarter to give it up so you're not burdened with the recurring expense.
