I would keep the choke manual so you have total control of the starting and warm-up functions.
You can buy the type of cable used for lawnmower throttle etc. off a bulk spool pretty cheaply. Since your cable and wire path will be moisture free this stuff should last as long as you care use it. It would be smart to keep any turns in your PVC conduit to 45 degrees or less if using glued connectors.
I may be more concerned about cold starts than you are; living there in the semi-tropics like you do.
Just my thoughts....
