There are a couple of suggestion going around where they could let us drop a fund into a pool which we can not retrieve. Daily upkeep will be deducted there until you depleted the pool of funds and you will start racking the upkeep payment once again.
Here's my suggestion, instead of having something that locks away your cash so that you cannot use it as an alternative vault. How about we us the current vault. The current vault have been recently updated to allow up to storage of 1 billion after you fully upgrade it. By allowing the system to deduct our property upkeep payment from the vault, it doesn't require players to monitor the upkeep payment racking up, or worry about dumping another lump sum locked up somewhere. this offers full access to your cash balance without locking it, but no unfair advantage of having a bigger vault than usual as you will be using the vault offered to you.
It will be easier to code a program to work with existing codes than to build a new one into place. Easier to code stuff means staff are more willing to look into it or implement it since it will take less of their time.
For the consideration of the general public please.