What should be my realistic expectations of being a USMC Reservist and running a small business?

(sorry this post will be all over the place) This is my second post on here. And i really need an experienced outsiders thoughts on this. I before explained my situation and what my delema is. But im at a major prodicament with myself on what todo. I think its because of my lack of knowledge and not knowing what to expect. Before i start hears my situation(to see more check out my last post). I am 18. I am rounding off my final months at my vocational high school. I have started my own excavation company. But im in a tough bind. Because i need to run my business but also want to be in the Marines as a reservist. But I think i found away to pull it off without having to ignore my company and be able to accomplish my dream of being in the USMC. So where im from obviously theres winter. But we get snow. which means the ground gets hard which means no more digging. So this is if you will the slow season. But come spring we are on like donkey kong banging out jobs we already have lined up. So I figure run my company for this year 2018. And come next winter i can either keep working and get a plow job or presue the usmc. So heres my thought. Late October to early November I goto boot camp. Thats 13 weeks. So for the sake of numbers lets say i leave October 10th. That means January 10th is when ill be done with basic. Than from what I hear you graduate and then go home for about 10 days or so. So thats January 20th ish. Than head to some sort of infinitry training for 3 weeks. That leaves me at Febuary 14th. Typically in MA where im from the snows pretty much gone by the end of March. So that leaves me with just about a month or so to goto MOS school. But i cant find anything online about MOS school. Do you have a 10 day or so break to go back home like you do when you graduate boot camp? If no than is it shorter or do you typically get shipped off right to your MOS school from infintry training. Also what MOS school takes the least amount of time? How long does a typical MOS school take? is there a minimum amount of time that you have to goto school for. Being in the excavation business as a regular job. It would be pretty cool to be doing the same thing for the USMC. Is there any MOS for stuff like this. If so what are they and how long does it take? Could being in the trade and having all my licenses already shorten up MOS school at all? Do I have todo all my MOS schooling all at once or can I do a little and come back and maybe pick at it throughout the year or do i have todo it all at once? Keep in mind time is a big factor for me so anything I can do to shorten time and get everything done I will need todo. Is their anyway i can go right from boot camp to inifintry and right from infintry goto MOS without going home. Or do i have to go home for 10 days and all that. I have also heard that the minimum time you can do is a 8 year contract. Is this true. I thought it was 4 and than once your four was up you could re enlist or retire. Or is the 4 year only avaible for active marines. Sorry for rambling. I just want to find away to make this work so that come spring time. Late march early april if possible I can be done with everything I need go back to running my company and do my drills every month and PT annually.