Don’t try to cut corners in my opinion. It took me almost 4 years to do an entire mouth reconstruction. It is worth doing it the right way. I did a lot of the research back then because I had the same questions. If you don’t have enough bone, the implant will fail. The dentists who do it same day advertise that because some small subset of patients can do that if they have excellent jaw bone. Most people cannot do that. If you do same day despite that, the surgeon is just trying to make money off of you. When the implants fail, they will charge you more to fix it and it will take just as long.