i wouldn't know what it costs to finish it but 12k was spent to get it to that point... to actually finish it i think i'd need a front end dev and a lightning network specialist
there is a lot of research and development work required to find ways to improve the network intelligence required because it is a source routed protocol, but also, because it is a source routed network transport, it might be a bit easier to solve some problems in a similar way as tor's telescoping system, except modified to be a kind of a "telescope ping" so clients can be confident that paths will carry packets to the destination, and i also want to complete my ideas about making "fork and join" paths that have a higher cost but lower latency
i think if i had access to a good FE and LN dev i could have a good late beta working in a year
i remember first encountering teh idea of "agoric routing" in a discussion on the tor mailing list back in 2006 or so, and indra is basically my attempt to realise it, based on what i learned from studying the lightning network, which also facilitates funding relays to operate
there is lots of interesting stuff relating to it being a kind of "spam resistant" network protocol that protects anonymity while preventing spam
the other big problem that i have not done enough work on is congestion, how to avoid congestion, i know part of that might relate to the "telescope ping" idea but also how to help clients avoid picking congested paths in general, this is one of the things that TCP solves but it's hard to do with a source routed network, because clients can all roll snake eyes at the same time and try to send messages through that path and it hits a point that is overloaded