Or you can get only (1) of either RS+ (single L1 freq.)or RS2 (new just released multifreq.) and use as Rover and use NTRIP CORS for your Base until you can get another RS+ or RS2.
I’d rather have (2) so i wasn’t dependent on CORS and internet, cellular if out of range of them. Otherwise you can use LoRa (LongRange) between your Base and Rover.
Fyi, getting a M+ is if you plan on using a drone since the price is cheap. If not, you don’t need it. Keep in mind that M+ doesnt have builtin LoRa like the RS+ and RS2. You have to buy that additional.
The additional equipment required is a phone/tablet/laptop and a survey pole. Possibly a tripod/tribrach as well or a second pole.
No licencing required.
A subscription may be necessary to obtain ‘better than android’ accuracy if you only purchase a single Reach unit. If you purchase two Reach units, then you may still want a subscription, but it is not necessary.
You also must invest the time to learn about how to get the data from Reach transformed into a meaningful form for your work. e.g. learn to use some open-source software, or purchase some commercial apps or software.