For half your disposable income for the rest of the year, you really need to love it. That's all there is to weigh up. Personally I could never spend so much on an item, even though I like fashion. It does look like good quality though. Is there anywhere you could try it on? The thing is, it's such a unique piece that you'd need the correct outfit for it to do it the justice it deserves.
Maybe shop around for alternatives or secondhand versions if it's going to financially hamper you too much. It's not the most common item I guess. It's kind of up the alley of like denim industrial wear reproductions like OLDERBEST and stuff.
What can I say really - if it's worth it to you then get it. It's nice.