If they're not the head of household they have to make a certain amount of money AND consent to the garnishment.  

Other persons may not move into the premises, eventemporarily, without Landlord's prior written consent. 

They will either consent or contest the law suit.If they consent, you both get out of court early.If they contest you go before the Judgel.After you have filed the paperwork in court and have a court date scheduled, what do you do next?

Can I remove him and rewrite a lease without his written consent if I chose to?

I understand - there's many layers of the situation, and I'm not looking at booting this guy as the magic bullet that fixes all our problems.But the real estate part of this is: If husband/wife are jointly listed on a mortgage, but disagree on whether a tenant should stay ... can one party press the eviction process without the other's consent?

It doesn't make any sense for a lease to renew itself if one of the parties no longer consents. 

You agree not to install a washer or dryer in your living unit without first receiving our written consent.

Never do an inspection alone or without their consent if they are occupying or have some stuff in it.  

Would you submit a rental application and consent to a background & credit check?

My guess is your position will be hard to defend with this type of tenant reaction combined with no written documentation of their consent.