Becoming a landlord

I found a two unit Townhouses in Williamsburg near the L train priced under $1M. The house is in good shape.
My plan is to put 15%down at purchase and rent one of the two units to help me ease the monthly mortgage payments.
I am a first time homebuyer, but an architect, so remodeling is not an issue.
Could someone share their thoughts if this is a good longterm investment? and any issues that might come up in the near future?

By egg |