Boat or Plane
I do not see why....
Yes. Easily. Especially being a UK citizen, it does not require the UK citizen to go to the US if needed for the immigration process.
about 8 hours
Maybe,but you can't go to the US website.Only if you go to the UK website.
Now! available in the UK and US GO GO GO
You can but be aware, that the UK citizen cannot legally change their status while in the US. It depends on where you both want to live. If the US citizen wants to come back to the UK, a marriage visa is needed from the British Embassy in the US. However if the UK citizen wants to live in the US, they will have to go back to the UK and the US citizen will then need to file the I-130. Until it comes through you cannot live in the US, but will have to wait in the UK.
Yes you can in the UK go us
Go to oanda.com and use conversion factor there.
In the way of actual paperwork, none apart from the marriage license. The UK citizen comes in on a visa waiver and you can get married in the US. For the US citizen to get to the UK, that is where the paperwork comes in. You both need to go to the UK embassy in the US and apply for a marriage visa for the US citizen to come into the UK. The US spouse will then be able to work straight away when you get to the UK also based on that visa.
not sure about UK but go on eBay(trade u for gameboy micro(not available in us))
Because the UK uses a different system of measurment than the US.
1 to 14 days or more