I'm here to offer some suggestions. There is a lot of flying to be done in Del Rio. Thing is there is no one there to do it currently. Once people know you're there you'll start getting business as a CFI.

Here is what you need to do.
1)Quit flying the twin. Complete waste and won't help you get anywhere you want to go. It hinders you and blows money you don't need to spend.

2)Focus on your CFI. Hit the FAR/AIM part 61/91 very hard. Get the CFI oral guide. Remember the CFI, maneuver wise, is basically a commercial checkride from the right seat.

3) Go to Pico Aviation at the Del Rio airport. At the FBO talk to Barney. The man that owns the FBO has a twin turbo-prop aircraft. He has his license but needs another pilot to take other people places. Barney can explain it more. He's an old hardass so just roll with it and you'll learn more there then you will from any CFI. Most rewarding experience I've ever had in aviation.

There are many Border Patrol guys there that will fly with you. It's possible the air force might also send you students. Currently they don't as they don't have a CFI . Make that your priority. Once at PICO you'll get the multi time. PM me if you have any other questions.