Hehe, on a lighter side, probably a bounty for the EAA software is the way to go.
(SONY released the new SDK on Oct 31, 2014 which is more polished than in the past. <-- except no support on BULB_start and BULB_end)
Before that happening...
I see many probably can't afford A7s initially to develop the code, I'd say go for an A7 (now made obsolete by A7 ii), or an even cheaper APS-C mirrorless (A5000 or A5100) to try out the concept.
I would think the following will be a quick-n-dirty way as a work around:
1. Use a wired-shutter timer control (about $20 and up) to set an interval shooting, say once shot every 20 seconds, pad 5 seconds in between to allow for image transfer.
2. Use a Toshiba FreshAir SD card to automatically transfer each captured image file to a PC "silently in the background".
3. The transfer folder in that PC will be actively monitored by DSS-Live which will do automatic stacking and image refinement on the fly.
3a. if necessary, insert some fast image processing steps <-- use WIndows PowerShell to automate such process
4. The processed/stacked image can be displayed on PC screen once every 20 second.
(From 1 thru 4, there will be no human touch, after the process is started.)
DSS Live only does average stacking, not sum, so that would limit the ability to do shorter exposers on dim objects. See Technical Information in this DSS Live link.