Hi Marchbirdy, I am going to state the opposite of these ladies, although I do agree with your nails being very breakable after having acrylics on.
I had some acrylics applied in March then took them off after a couple of weeks, and I'm having them put on again on Friday for my holiday and sister's wedding. They cost me £50 but the price varies from salon to salon.
I have the french manicure look and I love them, they are so strong and therefore don't break and look so good. So for me there a winner but everyone's different and what ever you prefer you go ahead with.
I don't know anything about any ultra violet, and the oil they give you does help to protect your nails.
I hope this helps, perhaps you should try a different salon for more advice on the types you can get.