To evict, he needs a reason.
Evict him.
I am presuming we have three components here: a landlord, a tenant, and a subtenant. The landlord in this case is presumably renting to a tenant, while the tenant is presumably renting to a subtenant. I presume that tenant has a lease while the subtenant doesn't. The tenant becomes the landlord for the subtenant. Since there is no lease (in most states subletting does not involve a lease) in this case, the tenant who is the subtenant landlord can evict the subtenant. While the main landlord can evict the tenant -which automatically evicts the subtenant -only the tenant can evict the subtenant. But the main landlord can evict all by evicting the tenant.
Your landlord can evict you and sue for back rent.
Yes.
no they can't
Either he or his lawyer.
no
No. You have the right to ask questions about this matter as every tenant who faces the uncertainty of his landlord being under foreclosure. But remember: as long as the landlord has control of the property he can still collect rent from you and evict you if you don't pay it.
The landlord can correct the problems for which the house can be potentially condemned. But the landlord cannot evict the tenant just for saying that.
Does the landlord have mental reasons or does the tenant? It's against the law for a landlord to discriminate on the basis of disability, inter alia. So a landlord can't evict someone just because he has a mental illness or disability. However if the tenant damages any property, whether it is for reasons related to the illess, he can evict.
It depends on your rental agreement. Eventually, yes, he can evict you and use the apartment as he chooses.