To get a more comprehensive answer, I suggest you work in private with a lawyer of your choosing

File an I-539 requesting an extension of B1 status

Yes, you can file an immigrant petition for your dad now and later for your mom. Contact an immigration attorney in private for details

You can check USCIS' processing times for the I-130 petition. You can travel abroad while the petition is in process but you need to reestablish...

Contact a family law attorney for assistance with the divorce

The spouse of the I-140 beneficiary may be included as a derivative when filing the I-485 so the spouse gets a green card the same time as the...

Considering the pending I-130, you have to show strong evidence of non-immigrant intent when you apply for the student visa

There are certain nonimmigrant visas that you can apply for without having to get a waiver of the 2 year home residency requirement. Consult in...

Might as well apply for an I-485 EAD as there is no extra fee when you concurrently apply for I-485

Either one would work. Make sure to keep proof that you timely responded to the RFE