It's something I looked into too Hilarysmum. The land here hadn't been used for over 6 years, so going Organic was something that was an option.
I decided against it for all the same reasons as already given. I couldn't justify the cost of the organic status.
A lot of my customers are people who would generally pay the extra to buy organic produce (if only I could afford to!!!) I did quite a bit of research and I found the main reason most people bought organic meat was to ensure good animal welfare. My feeling is that there is a change in people's thinking, the title of organic isn't as important to people anymore, their priority is to know where there produce is coming from and that it is good quality.
I feed GM free locally milled food, the pigs are all free range and well looked after (spoilt some might say!!) and my customers are happy to have good quality meat at a reasonable price.
Let us know what you decide Hilarysmum.