Having a third nipple is pretty unique, isn't it?
Just because you're unique, doesn't mean you're useful or have benefit to a customer. Unique is only worth so much, you just have to be preferred and that takes hypnosis aka desirably marketing yourself into familiarity.
Find out what customers like and see if you can provide it, sometimes your level of service is a niche market, but find wherever you fit OR make yourself fit by altering how you do whatever service you might provide. Word of mouth is nice, but for 99% of businesses, it's not going to keep you going. The propaganda machine of advertising is not perpetual motion, it needs effort and that's going to cost money and time.
You can be guaranteed one thing in business, if you are unique and it is profitable, then you're gonna get copycats that are going to do it too, then you're not going to be very unique are you?