So very sorry for the loss of your son. This is a tremendous cross to bear, but with God’s grace, you will make it through your grief.
Consider refusing to move.
If your landlord wants to remove you, he can bring an action in landlord/tenant court. But he will need grounds to do so. The allowable grounds will typically be spelled out in great detail in the wording of applicable statute (look up the law). If you were a tenant in New Jersey instead of Oklahoma, and your landlord merely wanted to renovate your unit but subsequently continue to rent it out, he would most definitely not, solely on that fact pattern, have grounds to evict. He would probably also not have grounds to up your rent beyond a certain point, which point might be a whole lot lower than the point he’s thinking of raising it to.
Check Oklahoma’s applicable eviction statute. You may find that what your landlord is trying to do does not comport with the law.
Also, don’t put up with an illegal lockout. If Oklahoma is like New Jersey, that’s an easy remedy. Just make out the proper affidavit, fill in the blanks on a court-provided complaint form in an Illegal Lockout Packet, and file it promptly with the proper county court. The Court will evaluate your papers, and if you have made out a proper prima facie case, immediately issue an order obliging your landlord to let you right back in.
Yes, that’s an option. But being here now hurts my family. Just seeing his bedroom door causes tears.