Hi,
Do you have a garage, shed or spare room? Just wondered, as the most cost effective way to rear your own meat birds is to buy in day old commercial chicks.
We buy in 20 Ross Cobb chicks for about £1.20 each, rear them under a heat lamp in a pen in the barn and then free range them at 5-6 weeks and cull them at 12-14 weeks depending on the size they have gotten to.
They are not sexed but they get culled long before any cocks start crowing. They are no bother at all and taste great.
I would imagine in your 10 x 6 pen you would only fit in 3-4 of them per time as they do grow quite big. Although you could have around 4-5 batches per year so you could manage to grow quite a few birds through a year.
I have worked out that it costs in the region of £5 per bird to buy and rear to table weight. It can't compete with Tesco's tortured value birds that sell 2 for £5, but I had been buying butchers free range chicken for years and a small birds used to cost me £13+ so as long as you want high welfare chicken then you will save alot of money.
Otherwise you could have a utility bird that will supply eggs and meat. Only issue with that is you will need a fully grown cockerel to breed replacements and with that you get the associated noise.
Best of luck with what you decide.
Steph