The more hard surfaces around the house such as sidewalks, driveway, patios, etc the more it will cost.

Loitering - How many people can you find walking on the sidewalks or sitting on their porch.

Tenants and neighbors can be a handful with parking on the sidewalk in front of the property.

And gaining the cooperation of an heir to acknowledge their beneficial interest, especially if small, can be daunting, like people who pass by coins on the sidewalk.

Its its a side by side duplex where each tenant has half the yard and sidewalk, I'd make it the responsibility for each one.

We have sidewalks, but they aren't used type hood, LOL..

I've rehabbed 150+ houses in various areas and it was the only place I ever had buyers complain that our scope of work was too incomplete -- things like not replacing ten year old roofs and sidewalks having small cracks.  

We pride ourselves on a very fast 5-7 day delivery into the home, not sidewalk delivery.We will measure, design, and submit a proposal at no charge to you, and we don't look at customers as customers part as a partner in a win/win partnership.

Exterior will include two deck additions, demo and redo of concrete drive, patio and sidewalks. 18 x 20 garage to be finished as studio and include addition of 1/2 bath.

Do your due diligence on the infrastructure cost to bring in curb, gutter, sidewalk, water, sewer and utilities if they aren't currently there, as this isn't cheap.