Hey asp1n,
For the very immediate future, there are validators that are willing to open relays, using pooled funds from their own pockets.
However, for the short-mid future, I anticipate this needs to be funded by the community, so it will have to do something similar to what PFC proposed (and passed) with prop 929
The discussion for this was here,
For the long term, I think the plan would be to upgrade ibc-go to adopt ICS029