So long story short I moved to a new company and the old company agreed to terminate the contract by email.

Any advise would be greatly appreciated.Thank youYou give them written notice if termination based on the timeline required by your state.

The final issue he has was with the termination clause.

Long story short his business or business model is failing and he is requesting an early termination of the lease.

Truth be told, we were already halfway through the transaction so rather than terminating the deal and marketing the property again, I agreed to the amendment of the buyer changing from conventional to FHA.

When we evict tenants or terminate their tenancy we still send a rent increase notice to those tenants along with all the other tenants' notices just in case those tenants fail to move, or in case we change our mind and decide to continue to rent to them.Raise your rents every year like clockwork so rent increases are an expectation and not exceptional.

I sent him notification to terminate after 30 days since it's a month to month lease. 

A 401k loan is typically called (30 or 60 days after) when the employment is terminated.

Not the best for big commercial buildings where you might want tamperproof hardwired cctv, but for a duplex house hack these guys are cheap, flexible, portable, and wireless (some need power but some are even battery powered).

Terminated the lease with one tenant so partner could move in (FHA loan).