ORIGINAL: hillbillyexpress
the worlds best trainer is the sig kadet lt-40. simply the best and most durable trainer ever. it is very cost efficient. it will run very well with a .40 size motor and even better with the os .46 fx. it will do some areobatics also.
hillbillyexpress,
Have you ever tried the Balsa USA Swizzle Stick for durability (have you ever heard of the Swizzle Stick)? There a lots of good trainers out there in the .40 class, and with limited knowledge it's difficult to be able to lay a blanket statement on one trainer like that over another. They all have good pro's and con's to them. There is no best or most durable trainer out there - it all depends on a persons preference, and factors like where are they going to fly, what is prefered in the area of the country they live, ect.
skelrad,
Seeing more of your situation, you may want to seriously consider an electric powered glider. That is the only plane I can think of that has enough wing area (i.e. low wing loading) that will fly slow enough to learn on at your altitude. Electric motors don’t care what altitude they are at, so that is one thing in your favor. Have you considered posting in the powered glider and glider forum? Some of those guys may be able to give you some good guidance on what would work at your altitude.
Wish you the best of luck.
Hogflyer
Hogflyer