I had three in 3 years and 2 months. It is extremely hard work and if I'd known just how hard it was going to be , I would have left a larger age gap.
Definately recommend getting a good quality double buggy and car. We now have a Phil and Teds which I find so much easier than a side by side pram. They are expensive, but worth the money if you walk a lot. Yes, abosutely Radio 4!
Go to playgroups, even if you hate them ( as I do!) because the children get tired and enjoy themselves. My youngest is now just starting school which is making things a little easier.
it is lovely that they all grow up together and you do get all the nappies and toddler years out of the way quite quickly.
There are some things I regret. Having to give up my career as a secondary school teacher and spending my life doing housework. If you can afford to, get a cleaner to make it more manageable, even if just once a week. Otherwise you do spend most of your time looking after the house instead of playing with and enjoying your children.
We have managed but it's not for the faint hearted and you do get very isolated. I have plenty of frineds but don't see them that often as the kids take up all my time! You will manage, I promise, but if like us you have no family help, expect to be exhausted for a good few years yet!
Try to set some time aside for you and your partner. Take all time out offered to you and make sure you look after yourself as much as possible; eat well, rest and pamper yourself when you can.