I tried making my own image, ended up making a mess of my laptop - I have early onset old farts syndrome and have a really big problem remembering things (I'm no spring chicken) so almost losing all my passwords was horrible.
All attempts at following the instructions to put the image on the SD card failed on this laptop so yes - I'd rather buy one
I already have a media player, this is for fun. Once I have it boxed and running then I can learn more.
But for now - its open the wallet time.
Joe is on the mark