I cannot speak on cost; but, a high-mileage R8 may provide difficulties in future resale. Acquiring it as an investment may not be the most prudent decision. If the goal is to get an enjoyable, cost-effective vehicle for weekend use, there is no better option available.
What is the proposed price?
It seems to be lower than the factory height. Does it has lowering springs or coilovers? Glad to assist with the installation of new magnetic ride shocks, should you choose to upgrade your vehicle.