One's approach will IMO depend on if single or twin axle is being levelled; I will leave it to the fans of twins to answer that part. I am firmly a SA caravanner, so will speak just about levelling them.
I learnt that "ramps" in what I meant as anything with a sloping surface for the wheel to reside on is not good news, wheels roll down slopes, it's the natural order of things. Remember also with our auto reversing system if you reverse onto ramps the brake will not immediately re-engage when the van decides to roll forward, plus it gets worse if you pull onto the ramp, then the park braking system stopping rolling backwards is decidedly less effective. I have witnessed a van just trundling with increasing speed backwards down an incline with the brake not fully set.
Way better is a stack of planks you can configure into "steps"; in reality two or three at the most "decking plank" off-cuts are enough Greater "lifts" then the pitch is not for us, the step into the van could be too much, the awning fit poorly. A poorly set awning would ruin a break for me, it has to be "right". Just as equally I can't "live" with a poorly levelled caravan, again it needs to be done "right" if at all.
These planks then, as said, are there for other roles, including on route van jacking and onsite placing both wheels on load spreading, thus minimising sinking in on less than solid pitches; an often aspect met on 5 van site or rally camping.
The amount of "pre-loved" wind up wheel lifts the OP is attracted to that appear in sales, rather endorses my take on their questionable "charms"!