I would agree, It may look quite expensive. But I just compared it with some other conferences like Oracle, Apple, Google, and I found that all of them cost quite close, even usually bigger.

I want to add, something. I'm Russian, and for us, it cost even much more expensive than for you. And unfortunately, last three years, I participated GlobalSummit and I think I was alone from Russia, except IS. But anyway, if I am not mistaken, last Global Summit participated by more than 200 people from 23 countries, but most of these people from the US.

I don't know how close my version of this method to the original, but it should be something like this. But I think, your version a bit bigger.

ClassMethod Main(cfg As %SystemBase, mode As %String) As %String
{
    set trantabla=cfg.trantable
    set str=""
    set list=$listbuild(72,101,108,108,111,32,87,111,114,108,100,33)
    for i=1:1:$listlength(list) {
        set n=$listget(list, i)
        set hex = $zhex(n)
        set str = str _ "\u" _ $extract("000" _ hex, *-3, *)
    }
    set str=$zconvert(str, mode, trantable)
    set:$length(str)'=12 str="????? ??????"
    quit str
}

Btw, it was a good idea, to deploy code. But I think bad idea to hide original string in $ListBuild 

set list=$lb(72,101,108,108,111,32,87,111,114,108,100,33)

Because, such static variables, stored as is in OBJ code, and could be easily recognized.

USER>zzdump list

0000: 03 04 48 03 04 65 03 04 6C 03 04 6C 03 04 6F 03         ..H..e..l..l..o.
0010: 04 20 03 04 57 03 04 6F 03 04 72 03 04 6C 03 04         . ..W..o..r..l..
0020: 64 03 04 21                                             d..!

For integrity checking only ^Integrity tool from InterSystems. And it should check database periodically, but it is not enough just to start periodically checking database. Backing up database also should be used, as well, as journalling for all time since the latest full backup was planned. Every day checking or every week depends on how big is your database, how much time it takes.

Repair, it is another story, I don't know any automatic tools which can do such task. It is only manual work, with some knowledge about the structure of Caché Blocks. I did it multiple times. For one customer I repaired database from corrupted backup. They used the same disk for database and backups, and after issues with this disk, one of the backups appeared to have more valuable data available than the database, but they lost some working days anyway. For repair database, the very useful tool is ^REPAIR from InterSystems. But sometimes even this tool could say that there is no database in this file. Once I succeeded with repairing database when some blocks were changed in their position, and the first block was deleted, and ^REPAIR said it is not a database.