We've seen some unique ones at Home Depot closer to Angels Vista. 

I’m doing this now and in my unique situation it works great because they get to see the place furnished and smelling great .

Are they uniquely successful?

The property won't appraise for what we feel it is worth (stop laughing) BUT is an incredibly unique home.

However, this is unique in that it isn't an early termination and we did not require them to vacate early so I'm iffy on how to approach this situation. 

Looking at this objectively I want to tell myself that the end goal of the deals (that may take 3-6 months) will be a lump a cash that is my income and that I have to be patient and thats how this business is.

That way you only make this mistake once.Also change your lease to prohibit vehicles left at the property not registered to signed lessees on the property and post a sign (and in lease) that they will be towed, and collect vehicle data at lease signing.I will have a conversation with them just need to consider all my options before I can articulate what it is I am objecting to when technically no rules have been broken.I do have vehicle data, it's part of the application and I have a clause in my lease which states one vehicle parking allocation per bedroom. 

Would appreciate any insight as this situation is somewhat unique and I need to make a decision quickly.

Because of nuances like this, and the many others unique to real estate, I'd encourage you to take any advice you get with a healthy dose of critical thinking as no one knows your personal situation like you do.

I have one property that is a bit unique.