Meh. Every board I frequent I always host images elsewhere, to keep the load (traffic and storage) on the board as low as possible.
I always resize my photos to 500K or considerably less, and don't post that many. I have maybe 3 or 4 guides with a couple of dozen photos each.
There should be a simple convenient method.
It doesn't get much easier than uploading an image to imgur.com, copying the image url and pasting the BB code into the forum post. You wont need to worry
about image size, either. If its way too big, imgur will bump it down (unless you have a paid account). And you dont need an account on imgur to upload anything.
[ img ] http : // imgur.com / nameofthefile.jpg [ / img ]
(without the spaces, of course)
PS - The 'insert image' icon above when creating a post will make that code for you, you just drop in the image URL and GG.