Depends what you're trading. I wouldn't say it would give you an edge per se, as that implies it's something few other people have, whereas the reality is 99% of the institutional community have this or similar tools.
If you're a retail FX trader for example, then I think you would have nowhere near a complicated enough set of requirements to justify the outlay. But if you're a fixed income portfolio manager, it's the market standard, and you definitely need it.
So imho no, home traders are wasting their money getting a bloomberg unless they REALLY know how to use one. I've been using one for fifteen years and even I don't know if I'd bother getting one if I traded small amounts from home.
GJ