if you have a good camera on your phone i can tell you a way that will cost you less than £15.
1) get one of these http://www.ebay.co.uk/itm/262467070101
2) download an app called 'whistle cam' from your app store
3) clip the swan neck to a bucket and insert your phone, put phone in selfie mode on camera and check your position in relation.
4) when ready for piccy you put phone in holder and start whistle cam, pose, whistle and wait 3 secs.
5) done
if you hadn't already guessed it is called whistle cam cos you activate it by whistling a sharp rising note
oh and by the way, welcome to the forum