Regarding your first question, there are a lot of factors at play so email me offline. Regarding your second question, always check with your school but what counts against your 12 months of post-completion OPT are pre-completion OPT and 12 months of full-time CPT.
I'm currently a student on F-1 visa. I had two questions re: immigration.
* If I apply to and get into YC, what would be needed on the visa/work authorization front? Will I have to apply for pre-OPT/CPT?
* When considering someone for post OPT, does USCIS check for 12 months including pre OPT and CPT or is it just 12 months of CPT?