Breast implants definitely will change the way people will respond to you, especially if the rest of your physical presentation is feminine.
Since you expressed the ability to return to "male mode", I think that you should consider breast forms, instead of implants. Some of these products are very life like and the weight and balance, especially when wearing a bra are truly remarkable.
If you are focused on breast implants, a few years ago there was a man who took a bet to have breast implants without any hormone therapy. He definitely looked male and had a slightly enlarged breasts, similar to any other overweight man. I believe he had 300cc implants. Moderate sized implants on a large man's chest do not look very glamourous, in my opinion.
The costs for breast implants can be any where from a few thousand to significantly over ten thousand dollars, depending on who and where your surgeon is located.
What ever your decide to do is ultimately your decision. I wish you the best and that your expectations are realized by the surgeon of your choice.
