I don't think you made a mistake at all considering the milage original owner and the price you paid. Looking at that rust bubble, it looks to be in the middle of the panel a la shopping car or car door. If the previous owner did not take care of it properly it is bound to rust in Wisconsin winters. Have it taken care of and any others, wash, wax and you'll be good. I don't think the ti is known to be a rust bucket ever.
And with a '95 you have an OBD1 engine, so you can actually chip it! I think anyways...