I had been around a lot of babies and children, as I started babysitting when I was 12. So I knew we were in for a lot of work, particularly if the babies were 'hard'!! These are my only children, and they were never sleepy babies. I'd say they bordered on colicky. In the end, I'm really happy that I had constant help for the first few months. We do not have any family in the area. Here's how we managed:
birth-3 weeks: DH home
Also during this time, the neighbors ran to the store and cooked for us often!
weeks 4 & 5: my mom came to stay with us, plus 2 in-law aunts were in town
weeks 5 & 6: DH home
weeks 7-10: In-laws came & stayed with us
week 11: BIL came and stayed with us
weeks 12-14: We all traveled from CA to PA to stay with my extended family
The girls were born in May, and I was only alone with them for a few days until the end of August, when it became a one mom show.
It was important to DH and I to have those first 3 weeks to ourselves to adjust and get used to the idea of our new family. We loved it, we all slept on the floor in the living room, we got little very little sleep, and it was a big blur.
DH and I were also keen to have help! We couldn't have made it through those first few weeks without our amazing neighbors and some of my colleagues who brought us prepared food (this is in addition to a well-stocked freezer) and ran errands for us.
We were a bit worried about all of the house guests staying with us in our tiny space (700 ft2) - my mom, DH's parents, DH's brother. However, we soon realized that having help around was key, and that having family at our beck and call was more of a help than an interference in our lives. It was nice for them to be around to do laundry, clean, cook, hold a baby, etc. Since the in-laws were here for a total of 4 weeks, we did find a house stay (free, b/c the owners were on vacation) only a few blocks away from us for 2 of the 4 weeks they were here.
In retrospect, the help was nice. Sometimes I wanted to be able to just get into my groove (particularly when my in-laws were visiting and then when we were staying in PA), but most of the time it was nice to be surrounded by people and not feel stuck and alone with the babies. Also, my babies were very much 'need to be in arms' little ones - no putting them down without screaming! Extra people meant extra open arms to hold babies. For our family, it was also good for them to be included in the newborn time.
It's also worth noting that my twins were born fully cooked & vaginally: that is, I did not have to recover from major surgery, nor did we have any nursing issues to worry about. If you think you'll have a C-section, you will have to take it extra easy after the twins' birth. As it was for me, I felt good but would begin bleeding again if I did too much (as in, a couple of loads of laundry or straightening the house or a walk around the block)... this was probably for the first 5 weeks. So, I would take your recovery needs into consideration when deciding what sort of help you might need.
If you have family nearby to come and help every day or nearly every day, you will probably be okay.
I just wouldn't plan on it being okay alone, b/c most twin moms think that having newborn twins is hard. Really. I think sometimes we moms have a tendency to try to be supermoms and do it all, but it's okay to ask for help when / if you need it!
Mama to twin girls Adele and Nadia, born 5/2008