Hi K,
Congratulations on getting married in Cabo! October will be warm and gorgeous here. You are right on the mark with Sunset de Mona Lisa restaurant. They have many weddings there each year and the view is sensational. The food is exquisite and it is incredibly romantic. I too had short listed this location, have you checked your junk/spam folder? I had that problem when I contacted them a few months ago. I found their email in my junk folder.
I live here in Cabo fulltime so I would love to help you as much as possible. Since I live here I am also doing a lot of DIY. I am planning to get my roses at Costco and hand tying them myself the night before. So many people on BDW have suggested this. I'm going to pick the roses up the day before allow them to open overnight then assemble the next day. If you want a professional bouquet I would recommend looking at some of the photographers websites for bouquets.
I would only recommend Suzanne Morel for makeup and hair. I have used Neysa on 2 occasions and have been very disappointed. Call Suzanne and speak with her, she always answers all your questions is incredibly professional and you will look amazing!! I use her regularly for special events and for spa services as well. Suzanne details everything in writing and emails it off for your approval. Suzanne has been here in Cabo the longest, has the best reputation and really built the wedding makeup and hair industry in Cabo. Personally for me, she is the only choice.
It could be that we are in the thick of wedding season that people are not getting back to you or also what you mentioned that you are a small wedding. My wedding party is the same amount of people so 10 -12 so if your bridesmaids don't mind they could help with your tablescape and other decorating should you choose.
On the music and officiant I'll have to get back to you I'm still doing a bit of research too. Hope some of this helps. My advice is to book all vendors early, October and November gets really busy for weddings too.
~ All the best ~