Practice for "Off-Linden" ?

I would like to creat the big scenery of forest and bush, but it is high-cost to possess the big land.
So that I start to try it with OpenSim(stand alone) and Hippo-Viewer.

SS is the New-Sim "65,000sqm 15,000prims" with no charge-fee, too calm.
The sound of cooling-fun for cpu/graphic-boad becomes calm too ;)

It woud be good practice to "Off-Linden", if they would force me to discard the viewer 1.23 ;)