That's a lot of money. Is spending it going to cause sacrifices in other areas?

Addorionally, consider whether you will get a minimum of £2,200 of value out of this. This is obviously at your own behest depending on what is valuable to you, but consider things such as savings on seat fees, food purchases etc as a starting point. Obviously sitting in a lounge is nicer than the departure lounge as well.

I wouldn't get enough value to justify it. Your thoughts and circumstances may differ.