In reply to mattrm:
I would suggest something like this
http://www.buzzflyer.co.uk/Walkera/Walkera-Ladybird-6X-Version/p-209-2359/
With one of the higher end transmitters.
The ladybird in itself is capable of doing fpv flight with the right bits added, but as its quite small, its better suited to indoor or very low wind outdoor flights. It is very good for its size, and will serve well as an indoor trainer even when you have upgraded
You wont be able to move the core electronics to a bigger craft, but the transmitter can be used.
The expensive bit of larger craft are the electronics tho, so youd be looking at quite an upgrade cost for proper aerial photography.