4 veneers is rarely satisfactory to patients
Lumineers is a brand of porcelain, and one that I do not care for. I think there are better brands.
After a diagnostic wax up I think you will see why 4 would not make you happy. Only you can decide, but 8 is very likely to give you what you want.
Look into a dental financing company to allow payments to fit in your budget. Composite bonding should be a last option, but realize it is a compromise and one that you likely won't like.
Have A Diagnostic Wax Up to Look at Your Smile Options
Before you do anything, find a dentist who will take impressions and make models of your smile and then 'wax' them to ideal. Go in to look at how it will look and do a mock up(we actually try in a model of the wax up). We do this all the time-it's fun and very helpful! You can do bonding first and eventually do veneers down the road as well!
Lumineers or veneers for spacing
Lumineers is just a brand name of a type of veneer. I personally do not like the way a Lumineer looks. From your photos I would recommend 6 or 8 as if you do only the front 4 it will make them very large and you will look awkward. Your teeth will not be proportioned properly and you may be unhappy with the final look. Ask you dentist to do a wax up to see what your various options look like
Dental cosmetic solutions using Veneers and Lumineers
Veneers and Lumineers are great options to correct spaces, and unattractive teeth. Lumineers works well on small teeth. misshaped teeth and dark teeth
Veneers does the same as Lumineers but it will not appear as bulk and give a more natural look.
If you want only 4 Veneers YOU MUST LOVE your canines teeth. 6 Veneers in most cases will appear more natural and you do not have to worry about natural tooth discoloration of real enamel. Porcelain can not be bleached.
Charmen Douglas DMD
Lumineer is a porcelain product name. I personally do not like the aesthetic properties of lumineers. in your case 4 veneers will give you four large wide looking front teeth, not your best option. Your bite is also over closed. looking at your case re-constructively , taking into consideration that your jaw needs better alignment for your head and neck, and TMJ health as well as longevity of your restoration, you best options in order of optimum result both functionally and aesthetically would be:
Full mouth reconstruction
Upper arch reconstruction ( dealing with your lowers later)
Veneers to fix a smile that went wrong..
Veneers are thin precision crafted porcelain facings that can change the shape, colour and form of the teeth. Asking "veneers or lumineers?" is much like asking "cereal or cheerios?", the best product to use depends on the clinical indication, much like the best cereal depends on personal taste.
To answer the question, veneers can be used to elongate the side teeth. 4 veneers may be enough but it may not allow your dentist to give proper proportions to the teeth. There may be a need to adjust the height of the gum tissue by preforming a gum lift as well. Average for a veneer is 1000-2500 per tooth.
Trust in your provider and you wont regret the results.
From your photos, it appears that your dentist is correct in suggesting 8 Veneers. If you only do 4 veneers, the 4 teeth will have to be way too wide and will not be proportional to your adjacent teeth. The esthtics of Veneers is much better than Lumineers.