PS if any devs out there could help out with a script to automate transmission of STEEM/SBD between a string of accounts and back to the origin account, leave a comment below and I'll give you a shout if they are interested in running the experiment. We'd need a UI where I could input the origin account, intermediary accounts and active keys for each.
Why don't you use BitShares?
See @josephsavage's comment, Bitshares has fees and network aside would still need to automate to do it in under a minute I think.
PS Bitshares is buggy af - I think something would go wrong. Hopefully gets better when it moves to EOS.
The advantage to Steem over bitshares in this example is that Steem has no transactions fees, while bitshares has a nominal transaction fee.
For the purpose of sending 'fiat' values from one business office to another, bitShares would be a better network because you could send bitUSD or bitAUS(?) and not have to worry about changes during send, but then transacting out of bitShares is even more complicated. so there's that
I haven't researched Stellar very much yet, but I will look into it.