I don't think you'll regret it. I've got a Reface YC (the drawbar organ one). It's really solidly built, extremely portable, and sounds fantastic! , I've been very very tempted recently to pick up a CP (electric piano) as well.
The mini keys feel fine to me, but that's what I'm used to - I've never played a full-sized keyboard. 🤷♂️
One-handed stuff is exactly what you need in most band contexts anyway. We all know that the keys player shouldn't be intruding on the bassist's frequency range... 😁