I can't really tell that the economy is based on anything other than summer tourism and thus AirBnB rentals would be difficult. 

It's economy is based mostly on tourism, but I'm not really looking to rent it as a vacation home.

A PPC ad is inbound - these are people seeking out your service.

Our market stays strong due to military bases, tourism, government jobs, safety and security.

I'm a digital marketer: Impressive resume/ but I feel like an idiot when I'm talking to real estate professionals.There is a lot of industry knowledge to try and wrap my head around.Right now I am developing inbound marketing campaigns for a property management company. 

Tourism makes up 0.001% of my market. 

I'm not sure who the current primary employers are ...in the past, it was manufacturing (which is now probably gone), rail road (now probably diminished), and healthcare (I know that one of the bigger hospitals in the area closed a while ago, and I'm not sure if it was replaced).  ...These days, I'm assuming tourism may be bigger than it was when I was young, but I don't know if tourism has been enough to keep the city in good economic shape...

As for Grand Rapids, it’s a popular town with lots of tourism, so if you were to buy a single family I would personally use it as a rental, as the appreciation is not very high for the area.

Tourism still appears the leading economic driver which will help support short-term rentals.  

I live in Hawaii full time and will say we've had an insane spike in tourism again - lots of visitors and demand for rental cars, dinner reservations, room rentals, tourist activities, etc.