Renter pays but hasn't responded in months

[Brandon Duff]

Hello, so I had great communication with my tenant for a year or so... but it's now going on the second year and lease is about to expire. 

I've sent an email, dozens of texts in a 3 month period and mailed them a lease renewal with no response.

They still pay rent within the "grace period", but NEVER respond.. 

What should I do... I want to sell my house and have my realtor take pictures to put on the MLS so I can use the gains to buy a 4unit but I live 4 hours away...

I could serve them a 24 hour notice of entry but would have to send my spare key to my realtor... which is fine but I don't want my realtor just to barge in on their house without them getting back to me.

Your thoughts