FindAWay

Diamond in a Day (DIAD) might be your best choice for CET Total Rewards casinos. Essentially, if you just want to be Diamond, you can play VP (or a different game, but, VP will likely be the cheapest) a lot on a single day and earn the status in one day for less play than would be cumulatively required over the course of year (I think it generally requires earning 4k tier points during a 6am-5:59am single day). But, if you do go for it, make sure to talk to someone from Total Rewards (or a host) at that casino on that day about the applicable details as it can change and varies by casino (especially, tier points required, timing of a "day", how long the status will last). Also, IIRC, be careful about the day you choose - I think I may have seen that if you do DIAD before 3/31 of a year, it is only good through 3/31 of the next year instead of the following year - i.e., if you earned DIAD status on 1/26/2012, then your status would last through 3/31/2013; but, if you earned DIAD status on 4/1/2012, your DIAD status would last through 3/31/2014 - I've never done DIAD, so, someone please feel free to correct me.

A $1500 (or a much smaller) bankroll should be able to get you DIAD on VP.

Here's a thread from a couple of years ago on DIAD: Harrah's Diamond in a Day (DIAD)

Also, you can do Platinum in a Day (PIAD) for less (3k in a day, I think); but, Platinum status doesn't get you much more than Gold.

Here's a link to Caesars Total Rewards Tier Status Benefits.

This requirement depends on location - diamond status alone will get you into diamond lounges in LV & most other properties. AC is the main culprit for imposing higher requirements.