I also want to chime in here that it appears there’s already a fairly active Tor network.
ZcashCo operates a Tor introducer node and some “network health” monitoring nodes in Tor-only mode. They see roughly dozens of Tor peers. Additionally there’s a community volunteer, @xyZcash, who’s been operating Tor nodes and taking donations for a long time, and they’ve now received a grant from the Foundation.
There are also several tickets for improvements to Tor and I2P support. I agree with @str4d that a really great step on this front would be a bundled installation that is preconfigured to use Tor or I2P.