Dh and I had been saving for our wedding when the house came on the market...so we bought the house and got married on the back lawn.
I'd say we saved heavily for about 14-15 months and then put 5% down. We had an 80% 30-year 1st and a 15% 15-year second. We've since refinanced a couple of times and are down to about 18 years left on one 20-year loan.
There are creative ways around the standard 20% down these days.