A couple of things you can do. Once you figure out your itinerary, you can find a bilingual driver for each area. And since you may not need someone full-time, this would probably be the best way to save money.
For instance if you will spend time in Quito, just take a taxi from the airport into the city and then arrange for day tours. Oswaldo Munoz can help you: oswaldo@nuevomundoexpeditions.com
He can also arrange a driver to take you to other areas of the country if you like.
If you’ll be going directly from the airport to Cotacachi, there are several bilingual drivers with vans you might hire — just repost here if you want those contacts.
Same in Cuenca and on the coast…you would probably fly there and then hire someone to pick you up. Just let us know where you are going and we can offer come recommendations.
One expat that offers a service as you describe is Jack Abercrombie. Everyone who has toured the country with him has raved about his services. He’s a good guy. Contact him at journeymanjack.com@gmail.com