I successfully eliminated all types of crawling pests larger than an ant from a duplex we own by physically sealing all holes that I found with caulk or even that nasty yellow gap filler stuff for larger areas. 

Usually they have found an entry into a crawl space, you need to seal the entry with them out.

I recently converted mine to a web app so that I can run numbers while touring a property: https://gocashflowapp.com

Got 3 written bids. 2 contractors found via national web based service.

Some towns will list contractors on thier web site who have worket in the area.

I was searching the web as I usually do and came across a listing someone maybe interested in.

https://www.canlii.org/en/on/onltb/Along with learning the RTA and visiting the LTB web site spend a few hours reading up on past LTB cases to get a better picture of the potential nightmare of being a Landlord in Ontario.

Per my home inspector - "The inspector found damage from anobiid beetles in the structural members of home in the crawl space.

Lastly, I've been trying to help an investor who I met on this site learn how to do meaningful web research on foreclosures.

I don’t want my full name on the public, in case anything I said it accidentally wrong on the web site and get bite by somebody (like tenants or whoever) in the future.