I commend you on wanting to go to work, but I hate to be a Scrooge. I wouldn’t recommend using this tractor to start a small enterprise with. The startup costs you will need to get going will probably exceed what you get out, unless you are extremely lucky. I’ve worked on many of those units and those used for blowing only lasted about two years, when everything was new, not 25 years old. Plowing even less. I live in Wisconsin and they aren’t built well enough for our winters. If you do start doing work, but your equipment fails you don’t look go. I recommend you would stick the $$$$$ you were going to put into two good used snowblowers instead. One good two stage unit for the big blows and a single stage unit for the lighter jobs. Being 14 I assume you will be doing this in your neighborhood and can walk it from one job to the next. Good Luck.
P.S. Might want to read this forum??
https://www.greentractortalk.com/threads/new-user-snowblower-for-jd-sabre.221111/