I think you will find 3K to be about the magic number. I have had quite a few jets, some high dollar, some not so expensive. The cheaper ones are more relaxing to fly for sure. I am now finishing a Baby Boomer that is getting a P-80 that I bought used for $1600. I will wind up with about 3K in it total using servos I had on hand. I think you are much better off with a used Jetcat, Artes, or even a T-500 than a new Jetjoe. You will probably never get the joe to run, and the others probably will work great out of the box. PST, Wren, etc. All are very good engines. Or go a few more bucks for a new 12lb engine like the Wren, Artes, P-60. Then you are set for a long time. My 2 cents. Bob