What you’ve missed it’s 2021....your post would have had some kudos posted 25 years ago, single sided swing arms are the norm now, any with the ability to fix a motorcycle puncture will have one.
I currently run 6 bikes, 2 shaft driven, 4 with chain, 2 have single sided swing arms...2 have centre stands and the only time they get used is when parked up in my garage.
As for what can be fixed and what cannot...,have carried a plug kit, gas cylinders,electric pump for years, after that it’s a phone call to break down and off to a motorcycle shop, both motorcycle and rear wheel....