Am halfway through a long eighteen month process of two bridges (bottom teeth and top side teeth) and a double implant, (two front teeth), and what I can tell you is that the whole thing was very expensive, but I'm glad I decided to go ahead with it.
The implants took a long time as you need them to settle in, and in my case as I had no base of bone to attach them to, (an infection had destroyed most of the root), the dentist has to 'grow' bone to attach the teeth.
Obviously have an experienced 'implantologist' do the work, rather than just a dentist, although a good dentist an cope with a bridge.
Suggest that you get two or three quotes from different surgeries, (the cost of the quote will be off-set against the total bill if you decide to go ahead with that particular dentist). Ask as many people as possible to recommend a surgery.
Take your time and it will be worth it.