Is my nose skin too thick for decent rhinoplasty? (Photo)

You most certainly are a good candidate for rhinoplasty. You sound like you have reasonable expectations which is important. A well performed rhinoplasty can reduce the length and size of the bridge, as well as making the tip and nostrils smaller. A natural result along with a masculine appearance of the nose is most important.

An in-person examination would be necessary to properly asses you, based on your photos you do appear to be a candidate for a rhinoplasty.  A rhinoplasty is an entirely customized procedure based on the needs and aesthetic goals of a given patient. Given the goals you have described, I think you would benefit from a tip refinement and nostril reduction with possible shaving of your bridge bump. I recommend setting up a consultation with a board certified plastic surgeon to discuss the best procedure option to suit your needs. Best of luck!

It is impossible to tell exactly how thick your skin is, but it does not look as thick as you make it sound from the description. Of course, nothing substitutes for a personal consultation, but I believe your nose can be made smaller and the hump reduced to make a visible difference.