I have a suggestion for you: What about an online academy? (there are a bunch out there, such as Laurel Springs).
I homeschool my two kids, age 5 and 11 and when my ds hits the high school years, an online academy, with emphasis on college prep, will be the choice we likely make. They really ARE competitive and GOOD, and yes, grant diplomas, as well as have high school graduation ceremonies for their graduates.
I, too, have tired of people who say we are limiting our kids' choices and social abilities in homeschooling. It's nearly always stated by people who neither know any homeschooled people and/or have a special interest in our public school systems. Some public schools are really not only poor education environments, but are out and out dangerous places to be today.
Anyhow, homeschooled kids DO do well in college. Check around; there are universities now that have set up special grants for HOMESCHOOLED CHILDREN exclusively. Tells you a LOT of what they think of the academic abilities of our homeschooled kids today. Their social interactions are often BETTER cause they are not limited 9 hours a day to nothing but kids their own ages with similar backgrounds, but a variety of people all the time! Anyhow......another idea....
Do you belong to ANY local homeschool organizations? If not, I suggest you do this soon-----------believe me they are around and the parents have tread where you are going now. You can do it, but it's not done ALONE!!!!!! Some sites that you may find helpful:
Good instincts, good luck!!! You are doing ok. You just dont' want to do it alone! Take care and HTH.