Two comments. First on goatees, I have one because my wife likes it, plus it allowed me to avoid regular shaving in the two areas I usually nick myself or get razor burn - upper lip and chin. It was a win-win.
Second, I change out blades every two weeks, shaving 4-5 times a week. I used to use them for a month and then I got a staph infection on my jaw, which my doctor attributed to a dirty blade. If you've never had a staph infection, you don't want one. I could not explain why I was falling asleep by 4pm, every day, no matter which day, or would periodically run a low grade fever for a day and then be fine, or so I thought. After that, while annoyed by the never-ending inflated costs of replacement blades, I stopped worrying about the cost, as using a dirty - even if you don't realize - razor can cost more than cash (that's my PSA for the day). Oh, and I also shave in the shower and use scalding hot water to rinse off my razors when I am finished.
I used to see an infomercials for a device that could clean and sharpen disposable blades. I've been curious about buying one to see if it actually does what they say it will. If so, it would seem to be a good way to prolong the life of the disposable cartridge blades.