I wrote recently about various ways to find Freebies in London.
The Guardian goes one step further in Bargain London by Benji Lanyado and claims that London is cheaper than Caracas.
I bet Hugo C. will protest.
Married with children, they suggest London's City Farms such as Hackney City Farm (sheep, pigs, chickens, ducks, rabbits, calves and bees).
Need competitively priced accomodations, he mentions the youth hostel YHA London St Pancras (pictured above, from their site) with prices from:
Adult: £21.95
Under 18: £16.50 (british pound is the currency quoted).
The place had a recent thorough makeover.