Dav_Renz

I may have overstated But hey, the first thing to fail is probably going to be the fan (I dunno, haven't looked at the capacitor ratings for that model) and you can always replace it with another one (if you know what you're doing and do it safely, with multiple asterisks of warning)

That PSU of yours will last you 20 years, don't worry too much about it

i wouldn't change it. isn't this the reason you went overboard with it in the first place, so that you wouldn't need to change it when you upgrade?

Solange das Teil net kaputt geht, brauchste kein Neues. Das hält noch ewig.
 
As long it doesnt brake, it will last a very long time.

Conversion rates 

why such an oddly specific budget?

Had this same issue with the company I work for.  After going back and forth on the costs and pro/cons we decided to keep it hosted by a third party in a remote location for security reasons.
If the data you have is critical and the company would have major issues without it, then you might want to consider this as well.
Bottom line, we couldn't physically secure the data from theft/fire/computer crash etc ourselves with a reasonable degree of certainty, so we pay someone else to do it.