Ive grown in a pc before. your set up looks good. the exhaust fan is at the top so its all good with the heat. you wont need 2 exhaust fans. You should 18/6 for 3-4 weeks and LST. After that switch to 12/12. it will increase your yield.
what strain you gonna use? with one female the smell wont be too bad. I used a carbon filter on my pc. i attached it to the outside of the box where the exhaust runs.. it worked great. theres many DIY filters on this site. i used 2 mesh cups,(a large one and a smaller one), panty hoes, and activated carbon ( for fish tank filters). you can also use ONA gel or air freshners like the one that sprays every couple minutes, yeah that would be good.