You'd have some initial setup involved, but longterm you'd work less at keeping a hub/tgp updated by using a script. Why not look at the free version of Smart Thumbs (1.5% skim for free version, can convert later to a licensed skim free option), and just use it as a rotator for your own galleries.

Another good one with a free version is RoboTGP.

You can then setup the free Arrow Trader Lite III and use that to build up traffic trades with the tgp.

On your tgp template you can easily add in areas for links out to your avs sites, or whatever else you want to promote.