It should be really straight forward to not renew their month to month agreement. 

If you do not believe the tenant and you think he swindled you then a notice of non-renewal is appropriate.

The Lease will be due by the end of March.I know that I won’t  renewal them and I also know they don’t want to move, but they can’t afford the rent as far as I could see.So my question is: what if they refuse to move after the 60 days notice that the lease won’t be renewed? 

Parent co-signer a must; Leases are for one year (in SC we do Aug-jul); Rent to a group and the lease says that if someone leaves (graduates) they are responsible for finding the new rental or I will not renew the lease. 

Worst case is the terms are so bad and the common charges go up so high they make the condo units worthless, or the landowner refuses to renew so he can build or sell something more profitable.

In the meantime, they are in breach of contract and risk you not renewing month-to-month. 

You are better off giving a discount for a one year lease, because you have flexibility to either increase rent or not renew at the end of the first year.

Hi Rene, we can help. 

I talked to my lawyer and he said with a lower income type property that it is better to renew the lease in 3 or 6 month intervals so that I have to option to terminate the lease rather than find grounds to go through and eviction if the tenant is not following the lease or paying rent.

It has the advantage of a single renewal and adding/deleting is done as a change to that policy.