Well there you go....
Salaries
2 x £18k salaries in 1999 would have given you a monthly take home of around £2200
£18k today is around £37.5K - 2 x that would give you a monthly take home today of around £5000
Rent
1999 - £800, 36% of your take home. With inflation the rent would be £1600 and £1800 today.
Zone 3, 2 bed flats are actually around £2500 on average today - rent has increased in real terms by 47% and would be 50% of your take home.
If your 1999 rent had been the equivalent of todays rents you would have been paying £1200 - 50% more than what you actually paid.
House Prices
A typical commuter house outside London in 1999 was £75k. If housing costs had risen in line with inflation it would be around £160k. A 5% deposit on a £75k house would be £3,750.
Today a typical commuter house is £290k - an 81% increase in real terms. A 5% deposit would be £14500.
If 1999 houses had cost the equivalent of today you would have been looking at £140,000 and a £7500 deposit
Outgoings and savings
Not sure if it was you, but someone mentioned saving 50% of their individual income, so I've assumed that
Your situation:
1999
Joint income of £2200
Rent of £800, savings of £550 a month towards a £3500 deposit.
Leaves you with £850 a month to pay bills and live on
You would have been able to save for your deposit in seven months
1999 with prices the equivalent of today
Joint income of £2200,
Rent of £1200, savings of £550 a month towards a £7500 deposit.
Leaves you with £450 a month to pay bills and live on
Would take 14 months to save the deposit
However living of £450 a month would have been impossible even in 1999, so lets assume you kept living costs the same
Joint income of £2200,
Rent of £1200, living costs of £850.
Leaves you with £150 a month to save - takes 4 years to save the deposit
Now lets look at the real position for people today in your situation.
Today saving 50% of one salary
Joint income of £5000
Rent of £2500, savings of £1250 a month towards a £14500 deposit
Leaves you with £1250 a month to pay bills and live on which is wholly unrealistic - especially in London, with a baby, but even if you did manage it, it would still take almost 12 months to save the deposit.
Today keeping living costs equivalent to 1999
Let's be generous and give todays couple the equivalent of what you had to live on a month (£850 = £1750 today)
Joint income of £5000
Rent of £2500, living costs of £1750
savings of £1250 a month towards a £14500 deposit
Leaves you with £750 a month to save - would take 20 months to save the deposit -
And that is if you genuinely think you can live on £1750 a month in London paying full time nursery costs.
Now do you get it?