Roofs are designed to handle snow loads that are disbursed somewhat evenly across its entire surface.

Similar to landscaping, snow removal, trash pickup, small maintenance and many other 'job' service providers.

I battled my way through snow storm conditions each way.  

Remember, repairs, utilities, CAPEX, PITI, landscaping/snow removal, vacancy, all have to be factored in.  

For example, you have a snow removal company remove ice and snow from your properties parking lot at 7 am the day after the storm but if someone slips and breaks their neck at 6 am they would have a legitimate claim.

If you owner occupy for a year with intention of making it a rental later, you could get caught in  a rule change.On the other hand you don't have to hire out snow clearing or lawn cutting, and don't really have to budget for exterior maintenance long term.Duplexes in the area are often older buildings and may have deferred maintenance.  

Landscaping upkeep, mowing the grass, shoveling the snow, etc.

If you have a snow/ice condition then it will have to be de-iced same as a sidewalk. 2.

An example would be a slip and fall on a snow covered sidewalk that you should have shoveled.

When you run your expenses on properties be sure you're accounting for vacancy, accounting, advertising, cleaning, insurance, lawn care/snow removal, legal, management, maintenance/repairs, cap exp., taxes, utilities (water/sewer, electric, gas, oil, trash, etc).