The Cavs and Other team's Free Agents
While NBA loves to make it easy to keep you own free agents, the natural flipside is that it is harder to pry other teams free agents. There are 3 main vehicles to get other teams free agents. Unfortunately, 2 of them are closed to the Cavs.
Cap space
This is the easiest way to sign other team's free agent. If you are under the salary cap, which will be about 66.3mil next season, you can spend that money any way you see fit. It also allows you more flexibility in trades (more on that later). We used cap space to sign LeBron, as well as do trades like the Leuer deal that brought in one of the 1sts from the Mozgov deal.
The Cavs do not have any cap space, and likely will not for a while.
Sign and Trade
There is a mechanism called a Sign and Trade (henceforth S&T) that allows you to acquire another team's free agent even if you don't have the cap space to do so.
The details of this type of transaction are here. Even though they had the cap space in 2010, this is how the Heat acquired LeBron and Bosh.
Unfortunately, if you are $4mil above the luxury tax, called the apron, you cannot do a sign and trade. The apron is going to be about $85 mil this season, which we won't be able to reach without losing a lot of guys. So, for now, S&T are out. Depending on many variables, S&T could become viable in the future.
Exceptions
One of my favorite salary cap topics is exceptions. The NFL has a hard cap, which states you cannot go above the cap number. The NBA has a soft cap. You can go above the cap as much as you want (most teams operate above the cap), but only in specific ways.
Mid Level Exception - The MLE is a way to go above the tax to sign any player. There used to be one MLE available to everyone, which was designed to be worth an "average players" salary. Now, the size of the MLE available to you depends on if you are above or below the cap number or the luxury tax.
All the details are here. The Cavs will have the taxpayer's MLE, and probably will have that for the foreseeable future.
Per the link, the taxpayer MLE starts at about $3.4mil this season. The Cavs could sign 1 player, or multiple players with this, as long as the total 1st year salary isn't above the $3.4mil mark. For reasons that will be expounded below, it doesn't make sense for the Cavs to split it up this year.
If we give the full the full MLE to one player and give him maximum years and raises, the total contract comes to
3 yr, $11mil. I put it in bold because that is most we can sign any free agent to this summer.
If a player is a free agent this offseason, and would require more than 3yr/11mil to sign, we cannot acquire them this offseason. That is immutable.
Bi-Annual Exception - This is similar to the MLE, but worth less money. It is also only available to teams under the apron, so the Cavs won't be able to use it this offseason. Maybe in the future.
Veteran Minimum - Like all sports, there is a minimum amount of money each player must make. You can sign any player to minimum salary at any time. No cap space is required. The minimum amount depends on how many years of NBA service you have, with longer tenured players having a higher minimum.
The amounts are here.
As you may notice from the link, most vet mins are over 1mil and top out around 1.5mil. This is why I feel it wouldn't make sense to split up the MLE. If you gave a player a portion of the MLE, it won't be worth much than the minimum salary. You can sign as many vet mins as you want, so no reason to waste the one time MLE when you could use the re-usable vet min.
The vet min is how the Cavs acquired Marion, Jones and Perkins this past season. Any "ring chasing" vet who has made their money and wants one last Finals run is perfect for this exception.