Do you think a spaceplane can have a 2-day turnaround (between flights)?
Sure. You could have even less. The question is: Can you afford it?
you would need pretty modular subsystems, that can easily be swapped for reducing the inspection times. For example engines could fly 5 times in a row and then be swapped for inspection and overhaul. You would need much more sophisticated self-tests. The longest period of time goes then into refueling all the stuff, and would be around 6-12 hours, especially refueling toxic RCS tanks is pretty slow for preventing accidents. But if the RCS would use for example GOX + kerosene, you could refuel the RCS in less than 2 hours, and only need minimal checks.
Next, you would install the space plane on a booster stage, since we lack currently the engine technology to make winged SSTOs... I include SABRE on the things that don't yet exist. Even if it is close.
Important is: Faster turn around times are bought by lower performance...or better performance results in longer turn around times.
A two stage space plane could be likely overhauled faster than a SSTO.