Plant pyracantha it has bloody huge spikes and is far better than glass etc.You can't get sued for having plants in the garden it really is nasty stuff.
I would go for a lightweight like an er5 or 6 much cheaper to run .Bigger bikes are expensive to run thirsty and expensive on tyres chains and sprockets.To be honest it's no cheaper than running a small car .Unless you can filter a lot to save time on your commute I would not bother
No stabilisers the hobby horse scoot along to get balance works well you can even buy bikes like it now from Isla bikes .Kids don't learn with stabilisers they just lean to one side all the time .Take them off and they learn quicker .One of my boys was riding at three.
Probably wrongly fitted them .I am a heavy lump who rides an overgeared single speed and I don't break chains.There was an article where someone got the boss of Sram to admit there is sod all difference in quality between their cheap chains and the expensive ones so go cheap and change often
And they are bullet proof loads around that have done well over 200k so paying 2 grand for one with 120/130k on should get you a car that will last a while basic 90hp one is a bit slow the 110 hp looks a good bet ,(these are diesels by the way)
But 740 Volvo's are horrible they really are not a drivers car and very thirsty too.Those Impreza's are a bit small in the back and driven by chav's usually!1
My mate has a Subaru engine in his vee dub t25 and it always breaks down .We keep telling him he should have bought a Transit and chucked a mattress in the back