I did a search on this topic before posting and did not find any posts, so here goes...
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My plan is to write a VB.net application that coupled with an SDR kit and weewx, will be able to accomplish the same as Accurite's access point but also allow for a little more flexibility in manipulating and sending the data.
Sorry didn't see this when it was posted. rtl_433 works with RTL-SDRs. It has a lot of flexibility.
For WeeWX, Mathew Walls WeeWX-SDR (Python) feeds Weewx using rtl_433 output, though I haven't actually tried it.
I'm using MQTT to send data from rtl_433 to Home Assistant and other sources. rtl_433 by itself still runs nicely on a RPI 1 B for most 433 mhz stuff (250 khz sample rate, minimal or no FSK decoding)
Hardware wise, my preference these days is rtlsdr.com's v3 units, they are a better built and perform reasonably better than others I've used. I haven't tried the latest from Nooelec.