The lenght of the A frame from tow bar to axle determines how difficult reversing is. The shorter it is, the more difficult.Often in cul de sacs and drives I have to unhitch my trailer.I drive a ducato and can't even see my trailer.(I don't have the one shown.)
My 400litre tank is heavy. When full almost impossible to lift off the bar, and hard to push up the slightest incline.Down a hill you might not be able to hold it, so give some thought to how and when you unhitch.
I have 100M minibore metal reel and if I can't park near enough often need it. The one in the pic looks like garden hose.
I fill up in my garage and needed a booster pump.(£200)
But I don't have to tax or insure it, and the bit's would always transfer into a vehicle at a later date.