Depends how big a helicopter.
They can pretty much land Any where
You will need 2 pilots
It can takeoff or land in where ever the position it was.... it don't need a runway...
There's only so much you can do to make a helicopter go faster; most helicopter operators are more worried about how much they can lift. Most guys who need to fly a lot faster than helicopters can don't buy helicopters in the first place. If you need to go 300 mph in an aircraft, and you don't need to land in confined areas or hover, you're better off with a Pilatus PC12 or a King Air.
You need to be more specific. Fuel costs vary as do the size of the tanks on a helicopter.
When you are buying a house you will want to know how much you land you have (area) and you will also want know how much fencing you need for you garden (perimeter).
Yup, and they don't need a runway.
You need to provide location and type of service needed.
There are no planes in GTA Vice City, only helicopters and a skimmer, which lands on water only, if you land it on land, you wont be able to fly it again. To get a skimmer, you need to finish the mission 'Dildo Dodo', to get a helicopter, one of the ways is to purchase Hyman Condo which is at the northern area of the West Island, and you enter the door which takes you at the roof and you will find a helicopter there.
No
A commercial helicopter can hold up to 200 gallons of fuel. How much it needs to run depends on how far the trip is and depends on how much weight it is carrying in passengers, luggage/freight, plus pilot / co-pilot.
For being a farmer there is no need to have your own land