Tester/diagnosis device

Moin My acquaintance needs a new diagnostic device. His current is just old and from former workshop needs. Now the question is whether to buy and install various programs via laptop and then just a diagnostic device? It should of course be for all brands and for things like brakes can put in “service position” etc. A new laptop would have to anyway for parts order, bill print etc. But it probably becomes more expensive if you put the matching plugs and S I’ve been looking for a bit and found a device like this:https://www.amazon.de/dp/B00NID586M/ref=emc_b_5_t I don’t know what he wants to spend about now. As little as possible but just. The whole has to be relatively simple. Since he doesn’t want to play around in the workshop forever. Do you have an idea what to recommend? mfg