I am in the same boat as you. TCI told me I was boarder line for a lift but would end up very large and need a lift eventually. I have decided to go with CosMediTour and head to Bangkok. Cost is $7900 and flights on top of that. Includes all accom and transfers etc. I thought that was pretty good.
I dont feel confident about booking all this myself thought felt better going through an agency.
I am nervous about the scars that I will end up with but everyone here all appear to have huge success stories and minimal scarring.