Our host sells the Porsche factory toolkit for $544. If that's too much to spend, if you do any of your own work (IMO) the 2 tools that you must have are the spark plug tool and the fan pulley tool.
For a compressor I use the Dewalt portable inflator that uses the 20V batteries. I got a flat tire in Elkhart Lake during Summer Vintage and was able to use this inflator to re-inflate the tire multiple times so I could drive to where I needed to get to repair the tire (had a nail in it). It's the Dewalt DCC020I. Saved my bacon. Paid for itself in one usage. Now I bring it with me whenever I go on a trip in ANY car.