It's essential to screen your tenants thoroughly.

So act quickly, do as the others are saying and screen him according to your standard criteria. credit, references, eviction history, etc.

Are you attractive tenants that meet your screening criteria readily and keeping them as long as you budget for (vacancy rate)?

Go to BUILD YOUR TEAM at the top of the screen and look for local investors or meetups in your area.

Quote from @Theresa Harris: Tell the tenant to phone the police and file a noise complaint. 

House HackAttend as many REI meetups as you can to grow your network of investors for referrals, help through challenges you may incur but don't have experience with, and learn from proven guest speakersNetworking app like blinq to compile all of your contacts for REI in one area with phone and emailbegin conversations with local credit unions exploring what type of loan products they offer

I've tried getting in touch with him today but he blocked my phone number (my texts don't deliver and my call goes right to voicemail.

Karl's Mortgage Calculator - This is a downloadable app for your phone. 

I would be happy to talk to you more about this over the phone.

It's difficult to see how a tenant will be after screened and signing a lease.