Would it be unwise to drive a honda crx in winter?

I have a 1990 honda civic hatchback with abit of rust, its not so nice looking, but its also not horrible to look at also, one of the bad reasons about the car is that it goes up to 350kms per tank, 35dollars to fill, thats costing my money alot as my job requires me to travel 1000 kms per week. I have a 1990 crx which is nice, i bought it for 1500 and i got a really good deal. The problems is that it prob needs a new starter and a few minor others (like any old car), it has a b18 (acura engine) and the cars so light i'm sure it'll be abit better then my civic. My job requires me to drive kids around (to therapists, family visits) and i was thinking that a honda crx would be to light in winter ( i'm paying 600 dollars to get a 3rd seat proffesionally put in the back ). I always wondered why i don't see any honda crx's driving in winter also, is it because of the wear and tear? The honda crx is one of those cars that if you had to pay 600 for a new axle you would cause its worth it.