Engine change Ford Transit Bj 2008 2.2 TDCI

Hello, I would like to renew the engine at my Ford Transit 180,000 km. For a few kilometers it only runs with reduced power. For diagnosis the cylinder head has to go out. A colleague taps on washed out cylinders or problems with the piston. Therefore, I want to directly build in a overhauled engine and at the same time renew the coupling. I get the engine for about €1,750 with hardened cylinders and 2 years warranty, kilometers unlimited. u, however, cause me some stomach pain: I am there with about 2,300 € incl. parts (coupling and injection nozzles clean, test) in the workshop. Does the turbocharger have what or needs to be renewed an injection nozzle, then it becomes even more expensive. Does someone know each other with the engine change? Is the replacement also possible in a self-screw workshop? I have already done a lot of things on the car myself, but the whole engine is not yet available. otor change with all the screws that need to be renewed? Has someone changed the engine himself and can give me some tips? Or recommend a workshop in the Munich area? Thank you very much.