4-unit property - rent storage space to non-tenants?

[Scott Harlow]

I have a 4-unit property with two workshop/storage spaces that are unused now that I'm finished with the rehab. The property is located in a downtown area where it's not uncommon to rent storage space to non-tenants. I'm currently looking into any potential zoning/land use issues. I have a few questions that I'm hoping the BiggerPockets community might be able to help out with:

1) Would this additional income ever be factored in to the value if/when I sell the property?

2) Would the income from these storage spaces make it difficult for a future buyer to obtain a traditional mortgage (i.e. require a commercial loan)?