Ian Grant
Subscriber
Based on forum size and activity a fully managed VPS with SSD and guaranteed cores/memory would suit them well. I host a dedicated server at Wiredtree and find them the best in the business and I hear good things about their VPS services. Their staff and linux techs are tops, best I've ever worked with. LFF would be looking at around $80-$130 a month to get set up with them. They could start with $80 and if all runs smooth leave it at that, if they need more grunt they can add it on the fly (for example add another cpu core for an extra $20 a month, etc).
Not mega-bucks and the LF Forum might benefit from some sponsorship/subscribers fees to become more stable.
I think the LF Forum members (not all), moderators and owner, are afraid of taking the step into being slightly commercial to cover better hosting and support. APUG is a good example of how a site can adapt and survive. There's a huge dual membership but the Forums are different and need to remains so.
These are really discussions needed there not here

Ian