ok so maby go with the 11.1v lipo and a resistor to bring down the voltage?
Probably not a good solution. You would be wasting that extra capacity as heat.
I really don't want to get too mutch into this one as its just a trainer for me and I'm dealing with very limited funds at the moment.
Then I think you should drop the camera requirement.
, or maby an electric converted nitro (not sure if thats been done yet).
Also not a good idea. It has been done, but to no advantage. A proper Nitro bird is designed to handle the stresses of a nitro motor.
I am not trying to bust your chops. I am hoping to set your expectations to a more realistic level. There is nothing about RC Helis that has anything to do with cheap. I know that sounds snobbish, but that is not the intent. We see a steady stream of people who want to get started, but want to do it for bottom dollar, so they get substandard equipment to save a buck. All they do is increase their odds of failure through extreme frustration, or if they make it through the learning curve with their poor equipment, the end up spending more than if they had just purchased decent equipment to begin with.
I am not saying to waste money on every expensive piece of bling. Just that making wise, if slightly more expensive, component choices will go a long way towards increasing your chances of success, and ultimately save you money.