Hello and welcome to the forum:wave:
You've come to the right place to find out about rabbits
Perhaps this will help you choose the right accommodation for your rabbits
http://forums.rabbitrehome.org.uk/showthread.php?t=215619&highlight=setups
it shows lots of different setups.
Are your rabbits going to be indoors or outdoors, whichever you choose they will need to have access either to a run or be able to free range for exercise, they need toys to stimulate them and access to unlimited hay, if you are getting a pair please make sure they are neutered, rabbits are inquisitive animals and love to chew, so keep this in mind if you are thinking of having them indoors
Rabbits also need to be vaccinated against myxomatosis twice a year and once a year against VHD depending on where you live the vaccinations can cost in the region of £20 each. (£60 per rabbit per year).
Also neutering for a male rabbit is approx £50 and £65 for a female, again this depends on the area you live. You will need to also find a rabbit savvy vet, as rabbits are classed as exotic animals and if they are unwell, they can deteriorate very quickly, so getting them to a vet early is very important.
This gives you a list of rescues, so perhaps you could think of adopting a pair of rabbits, they will be vaccinated and neutered and bonded
http://www.rabbitrehome.org.uk/centres.asp
I hope I've not put you off, but have given you something to think about.
Just one last thing, guinea pigs and rabbits should not live together, their dietary needs are different, and also if a rabbit gets upset it could kick the guinea pig and cause fatal injuries:?