Eric Linden, DMD, MSD

I would suggest you review the entire treatment plan with your periodontist and get details on what was done and why? Your questions regarding the waiting time after the bone graft is something you should direct to the treating periodontist.

If you are a candidate laser surgery is a great option. You would need an examination by a qualified laser periodontist with a full series of digital x rays to determine the best option and the best laser to use.
There are multiple wavelength lasers and the choice depends on your clinical exam and treatment objectives.

It is difficult to quote fees on a forum like this because each patient presents differently at the time of the exam. The treatment might require a different laser or possibly a different approach to attain the cosmetic result that the patient is seeking.
Find an experienced laser periodontist that uses a number of different lasers so they can choose the safest and best one for your clinically situation.

You should be seen by an experienced laser periodontist to determine if there is enough tooth structure to place another crown safely. Sometimes a crown lengthening procedure might need to be done to do a replacement crown on a broken tooth.  In extreme cases, the tooth cannot be saved and other options might need to be considered such as an implant or conventional bridge.
Of course an x ray and exam is mandatory.

Usually, the best way to do a case like you are describing is to have a well qualified cosmetic dentist or prosthodontist work in conjunction with an experienced laser periodontist that uses multiple laser wavelength machines to ensure that the safest laser is used that will not damage any of the supporting structures in your mouth.
In fact, ask to see pictures of cases that the cosmetic dentist and periodontist have completed.
Then you can you see what you might expect to look like after your treatment.