Please define "expensive". If it's a consumer app, hacking a wordpress template should only cost about ~$500.00 or hacking the sample projects from Parse.com can cost about ~$500.00-$1,000.<p>If it's a enterprise play, then you should be able to close $50k-$2mil for a paid project engagement from an enterprise client just by having a good powerpoint deck and an awesome sales pitch.<p>If neither options works, then you probably need to refine the idea more.
Redefine your MVP.<p>If it's too expensive it's not minimal enough. And if it can't be built (because it's too expensive) it's not viable at all.
Talk to more devs, or refine your idea based on feedback.<p>If you can't attract anyone, probably either your idea sucks, you personally don't add any value, or the scope of your idea is starting too large.<p>Ask them for feedback.
Two questions to think about:<p>1) if you can't convince someone to work with you to build this how will you convince customers to buy it?<p>2) if you believe in the idea enough, what's keeping you from learning to code?