I guess I am not sure this is headed, and especially with a $49 price constraint.
Are you looking to develop a SDR that plugs into another device? ie: Pi3, other SOC PC, PC?
Or a DreamCatcher Lite?
Let me give you my POV. My Dreamcatcher is on its way for to play with. This next part is going to sound harsh, and its not meant that way. OuterNet data service is of very little interest to me. If my purchase of DC SDR's funds that service for others, great! Its not for me. The board with the integrated SDR is the interesting thing for me.
What will I be using the DC SDR for? Standard SDR stuff for ADS-B. FIS-B, ACARS, POCSAG/Flex, AM Aviation, NBFM, and some other stuff if the programs work and the DC SDR can keep up. I am not sure the CPU will work with a couple of them, they do run on Pi3's. We'll see.
Depending on if all these work I have a plan for many more DCSDR's.
I guess I would be looking to go in a direction, further up the chain. Or DCSDR V3.0, with:
1GB/s LAN ON BOARD, for what I do, I want wired. I use wireless for very little.
Better SOC, Quad Core
Wider bandwidth on the SDR's, than 2.4Mhz which is basically about 1MHz plus/minus the center. For my plans having about 10MHz would be ideal.
HDMI Video out to ease setup the A13 SoC has a Mali GPU or is this disabled or a different A13 that doesn't have the Mali on board?
MULTIPLE SDR's on board
More USB ports, possibly.
The SAW filter on the board, needs to change to make it work with NOAA GOES, especially with the newer GOES-R. For me, EMWIN is the important part, this is a basically a full feed of NWS data, I use it for various things. Many of the companies making EMWIN decoders have given up with the changes in EMWIN since its inception. Having a CHEAP source of getting this data is needed. This is a BPSK 400K signal.
Trying to compete in the race to the bottom on price of a decent SDR, I think is the wrong strategy to fund the Outernet data service. The cheapo dongles on Ebay, and even the better ones at $30 from a few places one in particular, I think have that covered. I really don't know what you would do to make something better and meet the $49 goal.
Maybe if I had an idea on what type of device you are after DCSDR Lite or a sort of bit better SDR than the RTL-SDR.com V3 but less than the now $99 RSP1
I could give more input if I had at least some sort of direction you are headed.