Congratulations on your new coop and chickens. I'm sorry it's not everything that you wanted. Maybe your family will be on board soon and you can build your dream coop. Then, you can use this one as an extra coop. I just moved my brooder out to the main coop yesterday evening---a secondary coop sure would come in handy for brooding chicks and integrating them into the flock.
Perhaps you could put your whole coop inside a chain link dog run? Put some netting over the top and you can let them out in the run for extra space without worrying about them flying out. Sometimes you can find used dog kennels or panels pretty cheap on craigslist and similar places.