First, let me send my sympathies to you.
I don't know how you have the guts to do what you do!
I am not on D yet, so I have only a creative imagination idea of what button holes are. From what I have been reading in this post, a buttonhole is a hole that stays a hole in the skin (like a pierced ear) and for some reason doesn't hurt as much to use because the veins don't have nerves? Is this a close explanation? It seems that creating a "piercing" so to speak would be painful. Is this a better alternative to being jabbed with a sharp needle? Can you do "sharps" yourself at home or buttonhole "blunts" yourself without an assistant? I live with minor aged children, so they wouldn't be of much help to me.
I ask these questions because I have been thinking that PD will be the way to go when the time comes, but maybe this "buttonhole" technique would be a viable option. Can you travel with the machine? Go camping etc.? Are the outcomes better than in-center?
Oh, I also have a severe needle phobia, well I.V. needles anyway. I can have blood drawn and not pass out or cry, but the damn I.V.'s are a problem (esp. when it takes 4-6 pokes/diggin around to get it started.) And I assume the D needles are at least the guage of an I.V. needle.