Yeah with 35 people, you should be fine with Larisa.
Yes, for #5 we used Ambar Productions through the hotel. They were not cheap, but set up everything for us and it looked so beautiful.
For #6, I'm not sure who Maye Cortinas got the chairs and table coverings and vases from. But her prices beat the prices Larisa quoted us quite significantly. We brought the silk flowers and floating candles with us from the States. We only used Cabo Flowers for our bouquets, corsages, flower girls, etc. We spent a total of around $500 on real flowers.
Larisa had a local lady come to do hair. I can't remember her name. She was a blonde Canadian lady who lived nearby. She did a very good job. I did my own make-up...I'm an amateur make-up artist, :-), so I ended up doing my own as well as my mom and sister.
Also, I highly recommend that you ask Larisa to do the floating lanterns on the beach after the reception. That was amazing and definitely one of the highlights of the evening. All of my family and friends are still talking about it. Everything turned out so much better than I thought..it was such an amazing time.
Good luck and please let me know if you have any more questions.