Milia can be easily removed by ablative lasers and the success rate is quite high. With proper skincare, they can be prevented as well. The cost of removal in a medical clinic can cost up to a few hundred dollars depending on many factors.
If the diagnosis of milia is accurate, experienced beauticians in beauty salons can already help with the un-roofing and extraction of the milia, and it is frequently done together with the facial services that they offer.
Similar conditions such as syringomas or xanthomas may be much tougher to remove and more stubborn. I would advise you to consult a doctor for a proper assessment to understand your condition better, especially if you are uncertain of the diagnosis.
Hope this helps!