so I'm in a similar situation and this is what I did: this is my first time raising chickens of any type, and my husband wasn't crazy about the idea... so the agreement was we would start with meat birds due to their short life span and not put in any permanent structures.
For a brooder I am using a 3ft high dog exercise pen. I put a tarp underneath it and wrapped up the sides, threw some shavings in. When they were really little they could escape out but the tarp kept everyone in place. They are now 3.5 weeks old and the 16 sq foot pen is getting too small for the 12 birds.
For their outdoor home (which they'll be moving to this weekend), I am temporarily re-purposing my dog run. Its 10ftx5ft with a shade cover and paver block floor. I am going to run some poultry netting around the inside because I'm afraid that some of the DP cockerels can escape.
For only 6 birds, I think the x-pen would work fine.
Another good Idea!!! Boy you have got me thinking now. In fact the dog run is a great idea, bet I could find one or build one similar. Yeah with only 6 birds, don't need a great big structure, but big enough so they have plenty of room! Thank you so much!