Im planning a homebirth and have been since before i was even pregnant my booking appt.
I have mentioned it at every appt since, (am now 34 weeks) and was always told "its too early to think about birth now" However at my 31 weeks appt, midwife finally acknowledged it and wrote it into my notes 
Where i live is a long way from the hospital... a good 40 / 45 min drive (much more in bad traffic) and i doubt that even an ambulence could get me there in < 30 mins from the phone call, but for this reason, home births are very supported where i live. More so than many other areas, so im told 
Homebirths seem to be positively encourgaged to "low risk" mothers where I am, which is great.
I got a birth pool in a box, including a new sealed sterile liner, + all the pumps / hose / tap adapters etc etc (the whole package) for £32 on ebay. (collection only about a 15min drive away) so much less than hiring, + I can buy a new liner and use it next time too.
Also be prepared for lots of random people to think and tell you to your face how mad / stupid / selfish you are etc etc
. Make sure you have your facts fresh in your head to tell them back how what you are doing is actually the safest option for both you and your baby! 
Good Luck.