must admit, if 'scaling back' zerogain meant no need for funds, then I think that would be my favorite option.
Is the size of the database part of the problem? - how about deleting all photographs that are over say 6 months old? (keeping old message text is important I think, but not the photos)
Just another thought.
It would be good I think to get an idea of costs for different options... you know like...
1) scaled down zerogain without X or Y costs ....
2) full monty zerogain packed with features costs...
3) zerogain like it is now costs...
If we could get 50 people to pay just £1 per month on a DD then you've got £560 p/a