Yes, I am a single mom "by choice," in that I chose not to miss out on motherhood just because I had not yet found Mr. Right. I do NOT consider single motherhood to be the choice that I made; the choice I made was to be a mother despite being single. (Marda sounds very similar to me.) I wholly believe that the ideal situation for a child is to be raised by happily married parents, so this is certainly not what I'd planned. I chose to adopt a child, as a child needing a family needs a family whether one with two parent or one parent andd I wanted to be a mom. That's just my personal decision; it isn't right for everyone. I am a good mom, and my daughter has a wonderful life in a family where she is loved.
For me, I was at an age where even meeting Mr Right would make me pretty old to be a first time bio mom, and I didn't want to rush a relationship just to have a baby. It was pretty much "now or never" time for motherhood...there is no "now or never" time for marriage. It could still happen someday...unlikely at the moment, since I don't have time to devote to a romantic relationship.
A few thoughts I will share is to really look at your total resource situation. Where are you on estalishing your career? Do you have to travel for work? Do you own a house? Do you have an emergency fund and some savings? Are you debt free? Get ALL of that in order before becoming a single parent by choice. I took a lateral job move to virtually eliminate needing to travel for business, and I am not particularly promotable right now. I couldn't have done that at 28 or 30, and I also was not in the right position at 28 to do the optimal set-up for single parenthood. You have some time to do this...be sure you've got the pre-work established, as it will make your life easier when you really need it to be as easy as possible.
I was prepared to be a single mom, and I wanted my daughter more than anything in the world. I absolutely adore her, and it is the best thing I've ever done. However, it is unbelievably hard work (and extra stress) to parent alone with no co-parent. I knew it would be a lot of work, but it's even harder than I expected. I am single, but I have the lifestyle of an old married couple just without the husband. Divorced single moms often have visitation time away from their kids (and child support), and you will not have that break and are the sole provider. My daughter is sometimes confused about why she doesn't have a dad, especially around Father's Day.
Daycare is a lifesaver, a challenge and a huge expense. And, when you look at daycare prices, add in at least an extra $100 per month for extracurricular daycare activities, classmates bday parties, supply fees, registration fees or teacher gifts. If your child is sick, you have to stay home from work, and kids are sometimes sick a lot.
I will say that it gets much easier to be a single parent the older my daughter gets. It's still a lot of work, but it's not nearly as tough as it was when she was 2.
What I will say unequivocally is not to choose a mate just so that you can have children or a coparent for your child. If you want to marry, choose someone you want to be with for life, including life without or after kids. An unhappily married two parent family is no more preferable than a happy single parent. If you haven't met the person you want to spend your life with, single parenthood can be very rewarding for you and your child. Just be sure you've done your groundwork in preparing the best possible situation for you and your child.