Calculactory costs are costs that not necessarily apply, but that need to be considered like calculatory costs of a shop someone owns and uses instead of renting it to someone else.
The calculatory cost of using the own shop is the money that is not earned for renting it to someone else.
The same applies to the security deposit. Whether or not the deposited BKS need to be purchased just because of the signer job is not important for the calculatory cost; the money is frozen, minting canât be cone with the BKS, selling them isnât possible in this state. his creates calculatory costs.
The server needs to be way bigger. Imagine a signer doing the job for BTC, LTC and DOGE. All blockchains need to be on the file system. You need more complex backup strategies, because you donât want to sync the blockchains each time you reinstall the server. Taking a snapshot of the blockchain while the Bitcoin wallet is running is not that easy - is it?
It might require more skill, money and regular maintenance.