Even if you can get into NROTC (and I think they do have a program intended for folks who transfer in after 2 years which requires you spend x weeks in a summer catch up program) you would need to work your tail off to meet Marine PT standards to be eligible for OCS the following summer. For example, will you be in good enough shape to run 3 consecutive 6 minute miles? Marine OCS candidates can, or they come within seconds of it. Not saying it can't be done but the odds seem extremely long.
Something that sounds a bit more realistic and probable to me is to do AROTC, and this summer/fall apply for an NROTC scholarship. You must have less than 30 credit hours to qualify, but if you get the scholarship, hopefully that will give you the financial wherewithal to transfer after only a single year in your local CC. You can still use your plan as a backup if the scholarship doesn't come through.
Another option for any of these approaches is to apply to the Marine Platoon Leaders Course which will require 6 weeks over 2 summers, or 12 weeks over 1 summer (and you get paid) and leads to a commission as a Marine officer if you are successful. Your not even committed to the Marines at the end of this course (your choice, unless you take financial aid). 2 years of AROTC followed by 2 summers of PLC seems the likeliest plan to me.
Seems to me like that's 3 plans you can work in parallel which should increase your overall odds of success.
Good luck, and Semper Fi!