Ah OK, so you're proposing a P2P network between volunteers? I was initially thinking more along the lines of a distributed (rather than decentralized) liquidity bot system where each volunteer node dialed home (to the BOINC project) for instructions and perhaps used a multisig system to prevent unauthorized transmission of liquidity funds.
I like your idea! Whilst it may be 'inefficient and expensive', we're not running this on top of a blockchain - BOINC allows you to distribute software that can utilize the full resources of the volunteer's computer & network at no cost to the BOINC project (aside from web server costs).
Whilst a significant quantity of users may run BOINC on low performance hardware, there is a significant quantity of users with serious computing power at their disposal (individuals with hundreds to thousands of CPU cores).
Theoretically, you could be as inefficient and expensive as you want/need since it isn't running as a smart contract on a blockchain (unless you created a blockchain specifically for the BOINC project, which would be seriously cool).
RE: LiqBot 0.1 (alpha) | The open-source liquidity bot!