There are several good crimpers out there.
I prefer those by Greenlee, made in Germany.
There are two sizes of the manual crimpers: the K05-1GL
which can do AWG8 to AWG1/0, and the KO9-2GL
which can do AWG8 thru AWG4/0. I have both.
These are not cheap, but they'll last a lifetime if you care for them and you'll thank your lucky stars every time you use one! Here's the smaller one for sale on eBay: Greenlee K05 1GL Crimping Tool 8 1 0 AWG K Series | eBay
This model is short enough to fit in a toolbox; I always carry one in mine. The larger model is much too long to fit in a toolbox, but you need it when dealing with AWG2/0-AWG4/0 lugs.
By the way, these crimpers are also great for Anderson connector pins...I have lots of the gray 50A connectors on my equipment, and the crimpers make short work of installing new pins.
Re: the diagram, yes, that's pretty close to what I have on my boat. Unfortunately, my house bank is physically split port and starboard, but I always run it as a single bank. This has worked well for many years.