It's a designer dress so... I would really like not to have to throw it out.
Most Helpful Girl
I didn't have a sewing machine for the longest time and had only hand sewn, so if you are confident in your abilities then go for it, though of course it may take a while. Also, it's typically easier to take in from the side seams. However if there are layers or it looks as though the top can be separated from the bottom then I'd recommend taking it to a professional.