Sorry
@Iminei wasn't meaning to confuse. If you see a fabric you like online ask us folks here! We're never backwards at coming forwards with opinions.
For example here's a
viscose crepe from Rainbow Fabrics for £4.99 pm. That's the kind of fabric I mean. You would get a further discount for being new (or they have a spin the wheel thingy so you may get an extra discount).
Also are you wedded to that particular pattern? There are similar patterns about with the same neckline but which might use less fabric in the skirt. I'm just making up a Simplicity pattern at the mo which has a fitted bodice, v neck and pocketsies in the skirt. It has no zip or buttons. Yay. Simplicity is still on offer for the next couple of days. Can send you the link if you are interested.
In principle, I agree about going for the more expensive fabric but if you aren't confident then you could try the cheaper option. Hopefully you would surprise yourself by producing a nice dress which you could then make up in a more expensive fabric once you were more confident.