the easiest way to find out what something like that costs is to call and try to purchase the identical services from a professional. perhaps Tanya's neighbor.
Garments...yes, they are sacred to us so we don't talk about them a lot. But as a tangible symbol, they do come up so it's not strange that you're asking.
I have always explained that my garments are a symbol of a covenant that I made with God. They help me to remember to be modest in dress and actions (modest, I belive means not covering every part of me up, but not using extreme styles and being "conservative" in dress). It is an outward demonstration of an inward committment...
A lot of different religions have some form of clothing that they use for religious purposes:
-Jews put tassels on their cloaks and wear yarmulkes on their heads
-Muslims wear "hijab"
-Zoroastrians also have sacred underclothes
-Buddhist monks wear robes of a saffron colour, the colour being sacred
I feel that by wearing a garment under my clothes, it's a more personal committment. I don't have to share that information with anyone. As well, I wear it all the time. In this way I am able to remember my covenants all the time, not just when I am sitting in a chapel.
I hope that this wasn't too cryptic and I hope that it helped.