I agree, you sound scared to me, you are worrying about risks of twin homebirth - but what about risks of twin hospital birth? I agree neither situation is ideal and don't envy having to try and make a decision. In fact I'm really angry on your behalf that you are having to go through this at such a vulnerable time. It is not your job to find out this information, it is the medical professionals providing you with a service, and that service should be providing you with all the information you require in order to make a truly informed choice. e.g:
what is their rational for getting you out of the pool in 2nd stage? what study do they get their information from re. 4hr synto drip? how many midwives do they have confident in hands of natural twin birth? what is the likelihood of getting one on the day? what is the percentage of natural twin births there? what percentage need NICU? what do they base their need for constant monitoring on? why do they only give you 15mins for twin 2 to come out? what research is this based on?
I don't think it is helping you one bit reading all of the scary stories on here, especially reading them out of context without knowing all of the medical details, the background, why the scary events happened and so on.....the more you read "risk" information the likelier you are to need intervention as for birth to be as straightforward - and safe - as possible you need to be calm and confident and release stacks of oxytocin.
Yes having twins is riskier than a singleton in most cases (you can be a low risk twin mum and a high risk singleton mum!!)but it can - and is - be a perfectly straightforward, wonderful experience.
I think it might help you to get a dose of positivity/normality? how about paying for a one off consulatation with a local IM? (your doula knows one pretty well who is v.happy to do this), or paying for a telephone consult with Mary Cronk (v.respected, experienced IM), or emailing Michel Odent. Have you joined the Yahoo Homebirth & UK Midwifery chat groups? asking others with experience how they made their decision/getting midwives opinions.
What about calling the other unit and asking how they would treat you and booking a visit/appointment with their consultant midwife to compare the two units.
Have you seen this film?
www.youtube.com/watch?v=7E-wULAaD50
If you drop me an email to [email protected] I'll get in touch with my twin mum and ask if she wouldn't mind having a chat with you.
......and in the meantime I think a big hug & chat and frustrated cry with your fabby doula is in order. I know she has desperately been trying to find the information to answer all of your questions.