Nerjin, looks like you didn't take one of the house rules into account:
Magic armor, magic shields, enhancement bonus to natural armor items, and deflection bonus to AC items have the cost of said properties cut in half. Thus armor and shields are 500 * bonus squared and natural armor and deflection items are 1,000 bonus squared. Magic weapons keep the same cost.
So the cost of your armor's enchantment should only be 50k, rather than 100k. I'll glance over your sheet as well.
There's no limit on how many ioun stones you can have, including duplicates, but a lot of them have non-cumulative effects. Likewise, having a pale blue stone is pointless, since it doesn't stack with your Belt of Giant Strength, as they're both enhancement bonuses.
Also note that you can only wear two magic rings (and the ring of sustenance requires time to attune itself to you, so you couldn't just quick-swap to try to wipe away sleep, hunger, &c.). You could theoretically swap the regen for protection while out of combat, but I've got two things already to boost natural healing (Path of Shadows and an Eternal Wand of Healthful Rest), so you can get by without it.
Frankly, there are much better things to do with your ring slots. You can take care of all of your food+water+shelter concerns for a measly 5k gp with a Survival Pouch, which also gives you rope, loot transportation, and fire, all without wasting a slot.
e: What Harbinger linked is your master checklist for endgame purchases. It's a great resource,
here's two more.