i think it is also better to start with one and then add a second when the first one is all awesome and perfectly trained.
You'll need a lot of work to work, train, exercise, play and walk with both of them seperately.
especially the proper socialisation needs a lot of time and should be done seperately and every day.
socialising is more than them meeting other dogs and people. take them with you to cafés, restaurants, teach them to drive in the train, metro, the bus, a taxi, walk in the park with them, take them with you to children's birthday parties, fairs or train stations, the zoo, the vet, take them with you to all kind of places and let them listen to all kind noises, so that they get used to their surroundings changing.
RRs are still pretty rare dogs over here, so i can only tell about the few I met Rhodesian Ridgebacks are sensitive dogs, they use their own head and depending on the situation will make their own decisions, they're willing to deal with conflicts with dogs and people because of that(which makes them a bit different and in certain aspects more difficult to train that Schäfis for example).
these are not the simplest dogs, but so are chow chows in their way.
the question is: do you need two dogs that will be strongwilled, have high protection drive and preydrive, often have big individual distance to strangers and are pretty aloof or are you perhaps willing to meet the needs of two different breeds.
for example the poodle.They can be aloof as well, but they're much more willing to work together with their owner. they're fun to be around, relatively easy to care for if you keep the fur short, are great at adapting to their owner, you can do all kinds of sports with them that are boring for the RR, and overall they're just great family dogs.