Hi,
I think you have been treated quite badly by your hospital, continually putting this off etc, and if they have fobbed you off for the past 10 weeks, you can bet that 'the other m/w' will not find time to sort this out before you deliver.
The cost of anything to do with childbirth is just complete bullshit and is nothing whatsoever to do with you, so tell them that next time they try that one on
I agree that its probably got a bit to do with your age, but now you really need to be quite assertive, not in an aggressive or whiney way, but in a 'this is what is going to happen' way as time is fast running out. Its very much easier all round to have things organised, kit delivered, midwives on call etc prior to the event, rather than waiting until you go into labour at 3am and then the hospital trying to find someone to come out to you with all the gear. And judging by what you have already said about the level of entheusiasm from the midwives..........
The other posters are right that you need to download the letter from the linked website and send it to the head of midwifery tomorrow (if not today) and back it up by a phone call to the head of midwifery stating that you intend to have a homebirth and that you are now at term and it still has not been organised through the antenatal clinic and can she please look into it. Ask her to confirm your call by letter, and to expect a letter from you confirming that you are planning a homebirth and fully expect to be supported in your choice. I would also tell her that you will be putting in a formal letter of complaint if this all falls through due to her staffs' reluctance to do their job properly.
That ought to put the ball right back in her court, and if you do it by phone, they cant tell what age etc that you are. The response to that will almost certainly be a 'ok we will get this sorted out', so next, phone the midwife in charge of the antenatal clinic, tell her you have just had a long talk with the head of midwifery over the lack of planning of this homebirth and you expect her to get something sorted out urgently to facilitate you. If your phone call is followed closely by a 'whats going on' phone call from her boss, I think you will find it all starts to fall into place very quickly!
Its sad that you have to resort to this, but be strong and positive and hopefully it will all go smoothly. Even if you do transfer in, you know that you have given it your best shot. Also get the diamorphine / pethidine from your GP asap also, and ask him to give you a scipt for neonatal narcan,(which will reverse the effects of the Diamorph on baby if need be. The m/w should really carry some, but as a midwife, having done some homebirths, I would be a bit reluctant to give diamorph without narcan there too.
All the best - let us know how it went.