What is the difference between porcelain veneers and lumineers? How much would 8 of either cost?

Lumineers are a brand name for a type of veneer made under licence by dental laboratories. However, most if not all labs will make some type of porcelain veneer. Discuss with your dentist to determine what he has most success with and ask to see before and after photos so that you can judge the quality of the work. The lab is the key here in fact the technician making the veneers is really the key man to find. Consider asking if custom colouring is available so that the shading is matched to your surrounding teeth. Consider whitening your teeth before you have any work done so that the new colour of your veneers with match the whiter teeth.

What is the difference between porcelain veneers and lumineers? How much would 8 of either cost?
Lumineer is just a brand name and a type of veneers. Since you have eight to do and you are concerned about the cost, look into DentalService4Less membership, it could save you 25%-60% off veneers and lumineers. Make sure you have a good quality general dentist near you though; search by zip code or by full address.