Who fills out the rental application after an open house viewing?

[Ben Cochran]

I've looked for this particular question and can't find it on the forums so I apologize if it's been asked and answered elsewhere. 

I bought a duplex, live in one side and renting the other. I'm holding a open house viewing this Saturday. 

I don't plan on asking anyone to fill out the SmartMove application until they've seen the unit. 

My question is; which person fills out the $30 application? If I show the unit to 10 prescreened people, do I ask all 10 to spend $30 and fill the application knowing I will only choose one? 

What about the remaining 9 who filled it out as well? Are they just out $30? This is my first time to actually go through the rental screening process. My current tenants came with the unit when I purchased it. 

Thanks in advance!