Cuban has sold the Mavs to Adelson-Dumont Family

[F Gump]

I wonder when the terms of the partnership will become public

it’s an interesting dynamic between both parties. I think it will sound fair and make sense in a Cuban way like most of his deals

Cuban has the Mavs franchise which inherently has a connection to the city/county/state government.

Adelsons have the $ and the casino/real estate development business connections and experience 

Put it all together and they have all the ingredients needed (as long as they can pay off the government so they will steal from the citizens) 

The Adelsons must understand how important the Mavs are to Cuban. He would not sell the team unless his demands in that way were met first and foremost. He has said his kids will not run it. Something like he keeps being final decision maker on basketball moves and has a similar role to what he is currently for X number of years. Until 75, so 10 more years to enjoy it? Or maybe with a stipulation that he runs for POTUS and gives up control at that point? 

But the NBA “business” side of it i think will transfer quickly so they can start paying for what’s needed. Giving up the 51% assures the Adelsons will own the Mavs long term in every way. Cuban gets the temporary special treatment demands met. In return, the Adelsons get the discount in valuation. Cuban keeps the 49% so he can sell it down the road for much more than he sold the 51%.

1 All of what you say makes plenty of conceptual sense.
2 "I wonder when the terms of the partnership will become public " --- Never. No one puts things like that in the public domain unless they have no choice (for example, if one side sues the other). There is no reason to air such legal work to the public, and it's probably all downside for them if they do.
3 I expect the Adelson's will be buying way more than 51% up front. The reports spoke of a $2B liquidation being added to additional cash on hand, with which they are buying a portion of a 3.5B enterprise. I would be surprised if their share is less than 60%. And in time, there may be provisions for them to buy even more (perhaps all) - that's a common setup. Cuban will still have a public face with the Mavs for some time, but FROM DAY ONE he won't really be The Owner any longer, in NBA eyes.
4 When you say " the NBA “business” side of it i think will transfer quickly so they can start paying for what’s needed", I'm not sure what you have in mind. The A's aren't buying the business side, separate from the team, nor could they, as both "sides" are intertwined, and there is just 1 entity, not 2. The A's will await NBA approval to be the Governor, and then have majority partner ownership of all of it (as well as majority responsibility to see the bills are paid, but not sole responsibility).
5 In addition, if you are envisioning a cash infusion on day 1, I'm wondering why. At this point in the season, there's not a lot of opportunity to spend more than they already have on player payroll. It's not as if they are going to unilaterally back up a truck full of cash to put in the Mav bank account.