You'd need a lump sum of steem power up front, or some sort of steemautoish tool to trigger delegations from other accounts. For example, I could pledge a few hundred steem power, and the delegation team could trigger up to that amount for a certain period of time.     From there I would just have the delegation drop off in increments on some sort of aging schedule.  So if 100SP were delegated, you could drop it down a few SP per week until it's gone.  You could also have a minimum posting requirement to keep it active.  I think that would be important to ensure there aren't a bunch of stale delegations around, and at the same time give new accounts enough breathing room to build themselves up in terms of SP/RCs.

SPS could be used for operational costs.