Can I give a long term tenant a single notice that at once increases his rent in two phases & asks him to vacate?

I think you are risking a lawsuit. I would just give the 90 days notice and collect market rent upon renewal if they ask to stay.

In the state of nebraska, if a tenant breaks a lease, can the landlord keep the security deposit if there is no damages done?

The security deposit covers not only damages, but lost rent due to early termination. Sorry.

How can I prevent a possible retaliation claim yet also issue a rent increase and notice to vacate that I intended for a while?

Q1. I think a combined letter to T1 & T2 reduces your chances for that type of claim. Q2. That is what I would do. Maybe wait 3 months or so...

Cancellation of P&S agreement

Probably not. Under ESign the email would constitute notification. Google the federal ESign Act.

GETTING MY SECURITY DEPOSIT BACK. HELD FOR 30 DAYS

1. Maybe. 2. You can ask for triple under the Deceptive Trade practices act. 3. Yes. 4. I would argue 30 days.

A lease is a binding contract. You need to read or have someone read the entire document to make sure you aren't bound elsewhere.

How do I protect my rights to my portion of 80 acres of land from inheritance?

A General Warranty Deed is not an answer, it is a conveyance document that "transfers" your interest in the property described in the deed. ...

My daughter was expelled from college at the beginning of the semester and was charged the full amount for her dorm room.

This would fall under contract law. You would need to read the documents signed at enrollment.

My deceased mother had a reverse mortgage on her estate ,now in forclosure ,what are my options?

If, after the foreclosure sale, there are excess proceeds, as an heir to her estate, you could apply to the trustee for those proceeds.

Find out where your local eviction court is. They may have self-help instructions at the filing desk or online.