Finally got a super cheap version of a BeagleBone Black with the OrangePi Zero ($7), and with the OrangePi PC+ you get a board with a gig of ram and 8GB of fast eMMC for under $20.
Hopefully the H5 based boards and Arm64 in general will get better support, been having trouble getting NodeJS 6 or 7 running on aarch64 short of compiling it myself :(
Edit: Also FriendlyARM has a couple fun H3 based boards with the Nanopi Neo and a few others, might wanna look at those too!