The saying, "well begun is half done" was posited by a hard-working fellow lost in time. But many Porsches come to us with "half done" jobs. A half done job on my recently acquired 82 Targa was the A/C delete.
In reality, the job was 10% done. The compressor and evaporator were removed from the engine compartment, Oh, you can also add in the compressor belt.
So, I had the task of removing all the other parts listed in the four above diagrams. That is a lot of stuff. I have, I am not afraid to admit it, smallish hands. But even my diminutive mitts got scared and scraped digging into the smuggler's box and recesses of the engine compartment.
So, a "half done" job on your Porsche is not great to leave as is. It is not something to stand idly by and abide. If you work on those stuttering jobs in fits and starts, that is OK. You are in great company. I remind myself of Gaudi's Sagrada Church, still not done. But they are working on it....
And, if you sell a car with a "half done" job. Shame on you.