Rendering on house purchase

[Davewa85]

Purchasing a property, 3 bed semi which is mostly rendered. I'm concerned about the bottom finish to the rendering as there is no drip stop and appears to have been "repaired" by smoothing to the brick. All the mortar has failed in the brickwork below the render. My proposal is to cut up a 2 bricks and install a drip step and re render and repoint. Unsure if it is line or cement. Replace the air bricks also. Another concern is how high the flags and concrete are that they may have breached the DPC. Any advice welcome