Does tenants have the right to bring their rent current in TX?

[Joe S.]

So I have a renter that is a number of months delinquent. I am considering hiring an attorney to evict them. The attorney charges the full amount up front for an eviction. With that in mind what if the tenant tries to bring their least current without reimbursing me for the attorney fees?  Is a tenant legally obligated to reimburse me for attorney fees? Do I have to allow the tenant to cure their default? The property is in Texas.