Do you mean here on the RPF or just in general? Like, she's trying to establish her own costuming business?
I would say there is a need for more reliable and honest costumers. People who don't take someones money and run. And also for costumers who don't have insane time deadlines. The amount of costumers I hear about from others where it takes a year to make something minor is insane.
But I find as a costumer who takes commissions that I have been very very busy these past two years. But even so I don't make an extreme amount of money because soft costuming never seems as impressive as hard costumes. So you can get someone to pay $4,000 for a batman or Halo suit but ask $600 for an all silk medieval wedding gown and people seem to keel over and die from a heart attack.
I would say the need is more for someone who is willing to do really, really, really cheap stuff that's ok but very simple for the generic public costume enthusiast or for someone who has a niche. Something unique to their style and business. For example, my corsets and coats are usually what I get attention for and orders for. Only recently have I been getting more full costume orders but they are far and few usually.
Just my 2 cents and experience so far. I've also been doing this only for about 4 or 5 years so I might still not have enough experience to know truly what the need is for.