It depends on your hair type. Mine needs five or ten minutes of attention every day as my hair is fine, wavy and prone to frizz, and I have a cowlick. I have to wash my fringe every morning so I can blow dry it into the proper position. My hair is long so I just tie it back while I shampoo my fringe, no need to wash the whole lot.
The only problem is damp days...I usually wear it in a French plait across the front or clip it back if it's a filthy day.
I trim it myself, once you get the hang of it it's easy. Do it on dry hair though or you will end up with a tiny Bettie Page bang whether you wanted one or not!
Over the last five or six years I've had about six different fringes and grown them out, they are a nice way to make a difference to your appearance without a dramatic change to the colour/length of your hair (though I've done those too :) ).
I'm growing mine out again just now as expecting DC2 and don't want to look like a scarecrow when I get up, but it will be coming back once I go back to work, probably for good as I'm mid 30s now and they are really good for covering stuff up! See Mary Portas, her fringe makes her look really youthful I think.
Ask the hairdresser what kind of fringe they think would suit you and show them some pictures of fringes you like, then do it! Go on. Fringe fringe fringe fringe!