Welcome to the forum! Sorry I didn't do that before.
My average annual income is less than $8,000, you can afford a ChinaGirl. Use your weedeater to clean yards for old biddies, use the cash to get a kit from Dax. It'll cost a lot more than $250 to buy or make the parts you need to move that bike with a weed wacker. A twostroke kit is the most cost effective way, and Dax has the best.
The state of Michigan is flat as piss on a plate, I've driven all over it. Here in Arizona, we have Mountains, it's not the kind of desert most folks picture. My bike has to climb 1,000 feet in elevation in the thirty miles between snowflake and Heber, and has to pull around 300lbs total weight. From where I live, to the water company I manage is 50 miles one way. My bike does it no sweat, pulling that load up that far, climbing hills. There are dozens of 6% grades on our highways, some are miles long. Still, the cheap little twostroke does it. The mountain y'all ski on, the big one, is less than 700ft if I'm not mistaken. Our little one is 13,000+. There's bigger hills in Arizona than Michigan's mountains. Yep, you've got snow, but we've got big empty places, where the wind never stops. Half my kin are from St.Clair, Adair, Port Huron, and Marine City, you know St.Clair shores? Get you some good, wide knobby tires, a ChinaGirl, and a 56t rear sprocket. Next, a centrifugal clutch kit will help with keeping the rear wheel from spinning, if you can't master the stock manual clutch(it's tricky, needs a better lever that allows for more friction zone, aka slippage)
There are also "snow bike" kits available. Not sure if they're worth the trouble. You'll find that a bicycle does fairly well in the snow, but a motorized bike can be tricky. Ride with your left hand on the clutch at all times, in the snow anyway, it counts more than throttle when you're green.
Sorry, this was supposed to be an edit, not sure what happened.
MBs are still legal for you buddy.