i personally find the exceptional part of the image to be the blend of bright colours. I think it would be hard to replicate, but if that's not the important part/you're sure they can replicate it- then go for it
Guys - shut up with all the 'It'll look crap when your 70 stuff.' The OP obviously wants it and it may not look crap when she's 70. It may look like it's aged, but the whole nature of tattoos is that they stay permanently the same. The only reason it will warp is because of her skin becoming wrinkled, and I think we can all agree it would look pretty damn stupid if she had one patch of skin that resembled a 20 year old whilst the rest is old.
To the OP - get a very good artist. You will have to pay top dollar to get someone to replicate that to a high standard.