Interesting requirement.
I would argue that if there exist projects that need liquid expenses, then one project that would probably be funded would be something like an "angel investor" project -- perhaps it would take an equity stake in the project, and give the project liquid funds.
Projects with a track record (e.g., EOS) would likely get more fund per percentage.
Hmm, I've sent blocktrades.us some SBD and had them send me some SP -- so I know that SP can be moved from one account to another. Doesn't seem possible via the Wallet tab's UI, but perhaps steempy would show how it can be done?