I've been around the block buying my rentals via zillow/realtor email alerts, dirt simple.  

The roof rafters are falling due to water damage.

Moved out after a year and renting the top floor out, and now repeating the process with another house down the block.

Just prior to close build a new listing and block existing booking dates. 

(biggerpockets.com)When assets are damaged: How a cost seg study helps if an asset gets damaged!

But option A seems dangerous to property as it seems shifts the ground damaging the foundation and building as mentioned like below>>Designed to prevent the ground from shifting.From the nearest wall of the building this retention wall is at about 15 feet away.At one point i thought of putting some gravel for better water passage but dropped that idea as it cost money and becomes more harder to maintain by tenant or me in futurePlease advise

Like once we found that a tenant moved a gutter downspout, eroded the soil under heat pump pad and caving in enough to shortly damage the heat pump.

Someone took six months to build a 1600 sq. ft. 3/2 block house on the vacant corner, without a garage and i got to know her through my neighbor who worked with her before.

I think the middle road of trying to do both gives you the worst outcome (tenants damaging your property, lower price because it’s no longer new construction).Best of luck whichever path you choose.

I have a tenant whose condo suffered a major roof leak, which caused internal dry wall and related damage.