You can use the trailer balance spread sheet to try and estimate your trailer's end balance better; but that would only be as good as your ability to determine accurate weights and locations in advance. Still, most people find this to be fairly accurate, so it is worth looking at.
http://www.angib.pwp.blueyonder.co.uk/teardrop/tear81.htmSome things to consider are your TV's ability to handle tongue weight, and where you plan to locate heavier items, like heavy battery(ies). I opted to locate my lead acid battery in the tongue box, so my axle didn't end up very far back compared to yours, even though I also plan to bring some CI cookware and store my portable solar panel (among other things) in the galley.
Just to eyeball it, w/o any info other than you plan to build a "heavy" galley (assuming your battery will also be in the rear), it doesn't look too far out of whack to me. On the other hand, IIRC you said in another thread that your TV is a Subaru, so you probably don't want to overload the tongue.
I'm assuming that, at 10ft 8in, there is no need to hang the cabin off the back at all (i.e. cabin will not be cantilevered). On the other hand your tongue looks kind of short from the angle of that shot. If you are building a 10 ft cabin and still want plenty of room for a TB, you might want to look at hanging the galley off the back a little. You wouldn't want your TB to be in the jack knife zone and you want plenty of room between the tongue jack handle and the TB so that you can crank easily w/o busting your knuckles.