Hi. I think I don’t understand very well. If you ask spss a factor analysis with n variables, I think the only think you have to do is to ask it for the Sphericity Test of Barlett, by click the option into the window. If that test is positive (high value), you can relie on your results, that is, you can analyse your results and get confidence conclusions from them. If you have qualitative variables, perhaps is better to do a cluster analysis. Or perhaps, transforming variables in the sense that spss help say to you, comparing results between those two techniques.
Greetings.