Not sure if you read Ellal's post, but to me that makes the most sense.
If you level up you need to buy loads of top soil.
If you level down you need a few skips.
I've not seen the picture (blocked at work) but if the turf is in good condition strip it off and roll it up on both sides. Mark the center.
Dig the high ground and put it on the low ground, flattern it out and put the turf back down. Takes just as much time as the other two but without the expense.
If the grass is not very good, then just do as above but throw the grass on the low ground and load the soil on top of it.
If you level up you need to buy loads of top soil.
If you level down you need a few skips.
I've not seen the picture (blocked at work) but if the turf is in good condition strip it off and roll it up on both sides. Mark the center.
Dig the high ground and put it on the low ground, flattern it out and put the turf back down. Takes just as much time as the other two but without the expense.
If the grass is not very good, then just do as above but throw the grass on the low ground and load the soil on top of it.