I'm with culzean on the sump drain cocks, ok on racing cars, but I don't fancy the idea of them where there is the possibility of road debris hitting them.
If you want a quick way to change hot engine oil, get a vacuum pump - they do work, and modern cars are designed to have the oil changed this way, with the lowest part of the sump under the dipstick tube. I only drop the sump plug every 3-4 oil changes, but the oil is actually cleaner afterwards when the old oil has been removed by the pump.
A pair of metal ramps are cheap, and usually bigger than the plastic moulded ones.
Power impact drivers are fine for undoing things, but an extending wheel wrench and a torque wrench would be cheaper and more useful.
Those type of puncture repair kits are at best only an emergency solution. They are actually illegal here in the UK, the best way to repair a puncture is to take the tyre off and plug it.
You might also want to think about some more general engineering tools if you don't have them, screwdrivers, ball pein hammer, spanners, and a socket set - a cheap one will do, but throw the cheap ratchets away and replace with decent ones.