Yes, you need to be 21 to purchase any property that is commercial in London. It is dangerous for anyone under that age to buy one because you may not know how to care for it.
Probably Kent
London Property is very expensive. Few days ago a London flat 'sells for £140m' to become the city's most valuable property*.
Cheap appartments in London do not exist unfortunately unless you buy in a poorer less desirable area and are prepared to renovate. Zoopla and Rightmove have extensive property listings for London
The best type of newspaper to buy which lists rental properties in London would be a newspaper local to London. A great example of this would be the London Evening Gazette, which is sold both in Newsagents and on the streets by street vendors.
The loan to buy a property is known as a mortgage.
Property management in London has becoming very popular lately. In the next few weeks, there will be property management classes located in Richmond and Barnet.
You can't buy things in London with American money.
Generally speaking, anyone can buy property in the US
One can view london property that is for sale by visiting various real estate sites such as Remax, Royal LePage, The Property Guys, and many other similar companies.
All areas within one hour of London, regardless of whether the area is rural or not, would be within commuting distance of London and property prices would therefore be nearly as extortionate as London.
any gas station in London