For those who offer monthly services, do you ever start with a trial period?

I have recently been pushing my monthly exterior rodent control services to my customers and wonder if trying to get them set up for a whole year right away is a good tactic. I created a Checklist in Jobber for the service so I can document and show the client the amount of feeding in each station monthly.

Rather than getting pushback right away when I propose the service, I have had success in telling a customer I will leave the stations today, then check the activity next month. Then they can see the feeding level and get an idea of how many rodents are actually around their home. 

I feel like this has worked really well for me and wonder if anyone else has tried this approach at selling ongoing services?