For two guys this should be a one day repair (max two if you allow for time purchasing material)  You can use a jack(s) to temporarily support things while placing permanent wooden posts and sister new joists to the old ones.Finally, considering this is becoming more common, lease wording should address the specific act of multiple people jumping up and down on a residential floor.  

I'd leave a candy bar and small bottle of wine on each pillow. 

@Ryan Ball,my vote goes to improper installation.also the last 2 winters where really dry, so some movement of the wooden parts may have taken place.any other signs of cracks trough the house?

Creative idea and leaving food, water, spices, wine, etc will potentially improve the guest experience and lead to more 5 star reviews.

The kitchen features large quartz waterfall island, upgraded appliances, soft close cabinets and a wine fridge.

I am originally from wine country area north of San Francisco and I am fairly new to the real estate world.

Anyone have any knowledge on the success of STRs in wine country?

Moldings and wooden anything is at risk.

Above it are the wooden risers and just a few electric wires for the lights. 

After the building is auctioned, they will auction the liquor licenses which include beer, wine, liquor, Sunday sales and extended 2:30am sales.