You just have to be willing to put a bit more of yourself into it, and be willing to network to those around you who have same passion and desire to see this outfit shine. Most of my outfits are handcrafted, or pieced together with old clothing articles and repurposed household items. Example: currently I am saving all my can lids to someday build a dalek replica, and in another box, I have collected random objects to build a machine that goes ‘ding’.
On one last note, always remember to test your costume by walking, sitting, crouching, standing, (and especially in ladies costumes, to ensure no slippages) raise arms above head. Do this for at least an hour before deciding it’s show worthy. Then you can run around being your favorite character to your hearts content. 🙂
Here’s a video detailing a few other common things people seem to get wrong in regards to cosplay: