One is getting documents notarized by a US notary. 

Closing date was originally Feb 4th, and have an appointment with the local US embassy for Feb 9 to sign/notarize the documents.Thanks.

Then get it notarized legally through an attorney?

Even the closing attorney will be required to follow the specific language in the contract and adjust the HUD/CD that both you and the seller are required to sign and notarize at closing. 

The problem here that I will be the only one on the mortgage and therefore solely responsible.Can we sign a separate contract on the side and have it notarized that she has to pay me rent for a specific amount for 30 years or until the mortgage is paid off in full?

You can defend a claim of adverse possession by the orchard with a cell phone recording of, or a notarized statement from the previous owner establishing his repeated uses of that portion of the property since the trees were planted

ON our east coast closings that are all cash.. we get docs e mailed  print them  closer includes FED ex label.. before Covid when my staff was in my office one has a notary so they notarize in house.. then I have a fed ex main office within 2 minutes of us almost next to where we pick up our mail every day so its a routine  pick up mail  go to fed ex to drop off closing packages going to one of the 12 states we maybe funding in. 

If not, are brokerages willing to activate a real estate license for someone who's not selling for them full-time?

Can I use a quitclaim from Rocket lawyer and have my bank notarize it?

Preferably your agreement would be drafted by an attorney and notarized.