We are a young family and have been renting for nearly 5 years due to job moves, not being able to afford a house we like etc.
Renting is absolutely fine, yes there are a few drawbacks, and it gives you options and time to make up your mind about things. I guess the only thing is you sometimes can't paint the walls or dig up the garden as much as in your own house.
Just make sure the house you rent is not For Sale as well.
I have found that renting also stops us buying stuff we don't need like new flat screen TVs and Sofas.
My other advice - just cut up your Credit Cards and don't use them anymore. Keep the number somewhere in case you need to get a flight or something but cut the actual card up so you don't use it for impulse buys.
You can pick up a lot of baby stuff on parenting websites or the websites that give stuff away free.
Also the St. V. Paul in most areas have very good quality stuff (cots, prams, car seats) that they sell for a small fee.
You should enquire, you'd probably get better quality stuff secondhand than you'd be willing to pay for new, if you know what I mean.