What are the best ways to promote my Rover business?

Hello Rover community I was wondering what the best ways to promote my Rover business would be OTHER than sharing to my friends on Facebook repeatedly. Most of the friends on my list do not live in my area and I am going to be working from home and hosting dogs at my house for daycare and boarding. Promoting my Rover services in my area is harder since I only offer Doggy Daycare & Boarding currently. meaning local Drop off & pick up only. What are the best way to share my Rover profile info & my promo code? Can I ask grocery stores and such if I can put a few of my cards on their bulletins? Can I share to local classified sites? (I've already promoted in my area on Craigslist but $5 per ad! really?!) I have the means to make flyers with my info attached (plus the business cards I purchased through Rover Store.) I have been going to dog parks and talking with people about my services as well as asking their advice as sitters/walkers.