This includes detailing the front yard (with no weeds at all!)

"Well, a screw is loose, can you swing by and tighten that up?" 

The front yard and entrance set the tone.

Rehabbed it for around 30k, new kitchen countertops and some new cabinets, new appliances, new floor and paint, changed a door, changed the back yard fence, some siding on the outside and painted the outside.

If you are going to be renting both out, think about common space (eg yard) and access to parking. 

Yard needs TLC.

They have their own kitchens, they're living like real adults, access to a back yard, a front porch; all of these things will perpetually be attractive to them.

While it seems enticing to swing for the fences, it's better to get some small wins in your pocket and save yourself for another day. 

I Would love to invest in my back yard but I am open to buying anywhere nation wide.

All residential zones now allow multifamily and townhouse residences by-right.Zoning District Consolidation: Former "Residence A-1, A-2, B, and C" districts have been reclassified under "Residence C-1," which permits multifamily housing.Increased Housing Density: The amendment removes minimum lot area requirements, minimum lot area per dwelling unit, and lot width restrictions, allowing for denser residential development.Reduced Yard Setback Requirements: The minimum required setbacks (front, side, and rear yards) for residential properties have been reduced, allowing for more buildable area on lots.Elimination of Parking Requirements: The amendment removes all minimum parking requirements, reducing the obligation for single-family homeowners to provide off-street parking.Subdivision Flexibility: The definition of "subdivided lot" has been updated, making it easier for homeowners to subdivide their land for townhouse or multifamily development.Height and Floor Area Ratio (FAR) Changes: Floor area ratio (FAR) limitations for residential properties have been removed, and height limits have been increased to permit:Up to four stories in Residence C-1 districts.Up to six stories for inclusionary housing projects on larger lots.Anyone who's familiar with Cambridge knows that this is one of the most prestigious, elite, expensive, restrictive areas in the whole state, and for zoning of this magnitude to be passed is truly historic.