The Prusa I2 is a good starting printer. Its easy to build, well documented, and parts are easy to source. I dont think you will have much trouble with wobble unless you are going to do some super speedy printing. As for wire strain, that all depends on the quality of the electrical components you are using and how well you wire it. I've only broken one wire since I started printing about 6 months ago so I would say its probably not as big of a problem as you might think. I wish I could give you some insight for some of the other great printers out there but I've only dealt with the I2 so far. Hope that helps!