I would paint the outside in a light color and install contrasting window shutters.

Also paint the Visual exterior sides a consistent light color to reflect the sun.

Slow leaks from flappers are tough unless you do the old food color test & tenants are usually oblivious to it. 

. #2 dress from the front of the house, I don't see any photos of the front but make the colors with plants/flowers look different than it does right now so it has a fresh face lift (don't spend alot) #3 bring your rent just below market with a clear clause for increase in year 2.

They were clean, neutral colored walls with black appliances in one unit, and white in the other.  

We have just a couple of items left to touch up in the areas of the new "body" colors then paint the trim and that's done!

I am in LOVE with the color scheme.

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Do they come in colors?"

. - $4,000.00 3) Frame and finish basement - $6,000.00 (with full second bath included will run about $10,000.)4) Painting a property of this size including the finished basement - $2,500.005) Remove and replace all doors (about 10 in this property) with 6 panel hollow doors - $15,000.006) Install HVAC to include Furnace, condenser and ductwork - $7,500 (If the ductwork is already in place we can have a 2.5 ton furnace and condenser installed for $4,000.00(ductwork is the most consuming and labor intensive part of installing a HVAC system)7) Install carpet on second floor(This includes all three bedrooms, hallway and stairs) and basement $2,300.008) Refinish hardwood floor and new color of the stain of for the living room and dining room - $ 900.009) Replace windows with all new energy efficient vinyl windows - $3,000.00I think that's all of the big stuff.