I think even if you get into RMS, you will still be using some single-use too. When I go to a launch, I like to have about 5 flights, give or take. You can’t do that if you are cleaning and building motors at the launch. And buying that many cases is kind of cost prohibitive out the gate, so it might take years to build up the hardware.
If you are currently flying single-use, you can probably plan to keep doing that and then get into RMS and mix that into your flights a bit at a time.
Reloads offer a variety of propellants and thrust curves that might be interesting to you. It takes awhile to break even on cost, but some people think it pays off. And some people like the process of building motors (I don’t). So there might be reasons to give it a try, but it’s not an all-or-nothing decision.
Personally, I fly a mix of single-use and CTI. For midpower, it’s almost all single-use, except for a few specialty loads, like the CTI G54. For high-power, it’s pretty evenly split between Aerotech DMS and CTI reloads, with an edge for CTI as the motors get bigger. DMS are single-use, but with an adjustable delay, CTI is about as simple as DMS, with the added step of sliding the reload into a case (you don’t “build” a CTI motor). I’ve got some Aerotech DMS standby favorites I really like and almost always have on hand, and I use CTI for the variety.