Nonrefundable booking deposit

So I would like to collect $50 at time of booking and the remaining balance 1 day before check in. But make the $50 nonrefundable. 

I can either: charge them a cancelation fee of $50 or use a no cancelation policy as work arounds to make it happen. I have not found a way to do it in settings as an option. 

With all that said.. what would be the best way to make that happen actually? I see issues with both of the ways I mentioned, so I'm unsure and seeking advice!

Thanks in advance

- Lacey Jones 

Charging the initial $50 as a cancellation fee would be the most common version of this that we see. 

Keep in mind though, that wouldn't work for Airbnb bookings, as you have to use one of their cancellation policies. 

"Super Strict 60" would give them a 50% refund if canceled at least 60 days prior to arrival.