It wouldn't make up for the true value the heavy hitters provide but I think it would be a small gesture that would let them know they're appreciated.To those that share their knowledge, THANK YOU! 

Hello Everyone,I am considering leaving a gift or a couple items for new tenants upon move-in as a gesture of appreciation and goodwill.

Make the gesture now and toss him a few extra bucks

Once the tenant has satisfied their 1 year commitment (and has been a good tenant) I allow them to go month to month more as a gesture of good faith than anything else.

Cool gesture. 

A side note, it may already be on your checklist but room darkening curtains or blinds are IMO a necessity for traveling nurses, you never know what shift they will be working so they really appreciate that little gesture. 

This type of gesture is quickly spread amongst the complex.

It doesn’t matter the gift, you can’t please everyone and even if it’s a nice gesture such as wine, now it’s wine that’s not good enough lol.

It's a nice gesture and you have to put yourself in their shoes.

You have a lot of flexibility here especially as an owner occupant.Ask them to self report, qualify them  (I'm assuming you are meeting them) and then say they are accepted pending successful completion of the $40 background check.Maybe even refund the $40 after passing as a gesture of goodwill?