This is not bad but it will definitely take away from my budget to improve the interior of one unit that will be vacant this month in addition to installing a mini split system in each unit and possibly getting a new walkway and fence. 

An Architect can look out for your best interest in the project plus can bring all the Engineers necessary for the build (Civil, Structural, MEP, Sprinkler/Fire suppression, etc.)As far as the build itself, if it's in an established city or town on a tax lot, then you'll need to go through the design and permitting process, gain zoning approval if necessary, and then build up from there.

Personally I use Forefront, but its mostly designed for real estate leads.

Things to look out for are old windows, old wood siding, peeling paint on exteriors and interiors, and damage to window sills, door frames, and walls.  

We dedided to do all the details exceptionally well, make sure we are in the top 10% from a quality, design, renovation standpoint when compared to our competition.

Don't have them do the actual building designs. 

While some say the handwritten look adds a certain authenticity, a well-designed sign with a clean logo could attract a different segment of sellers who may prefer dealing with someone who presents themselves professionally.

5 - Architect/ designers?

I am considering bringing on someone to my team that specializes in residential design or shall I say, redesign. 

I work with Neu Real Estate Group, and we focus on new construction duplexes designed specifically for rental returns.