20 years ago, it would have been far more difficult, if not impossible, to replace your missing teeth after three years, but thanks to modern dentistry you can have new teeth with dental implants that are just as strong as your natural teeth provided you have enough bone support.
Even if you don’t have sufficient bone support, bone grafting procedures often make implant placement successful. I highly recommend that you see a specialist who has extensive experience planning complex tooth replacements. Seeing a dental implant placement specialist can help you evaluate your situation and will give you a clearer picture of the entire procedure, a timeline, and a budget. Good luck!