I lost seventy pounds in less then 4 months all by myself. Eat healthy, walking and some running.
I lost 50lbs before I ever stepped foot in the gym or talked to a trainer. I did that on my own to prove a point to myself but I did it almost exactly like that
With as much self control as you have I would build my own plan. Set your goals and do it.
That's pretty much what I did but the problem is that researching things on the internet generally works like this: article 1 says you should lift high weight, low rep article 2 says low weigh, high rep, article 3 says do 800 squats a day or you will catch AIDS.
I hired "professionals" to help me develop a plan and correct my form but that didn't happen. Hell I still don't know if my deadlift form is worth a crap because they avoided it like the plague.