MTG Salvation

So,I saw these cards where Platinum angel means you can't lose, once I get indestructible and hex proof on that I am set, same goes for Platinum Emporium. I would like to know good tutors to get hexproof and indestructible cards, and whether there are counters to this combo, obviously counters are the big threat. I would also use Elspeth, Knight-Errant and Dormi Rade to make the effects undestroyable, so with both emblems out, and Platinum Angel I would win, to keep alive to that point I would use a lot of defenders and prevent damage spellsI am looking to make a commander deck around it, do super expensive cards as I am looking to make this for under $50 (my playgroups rule)