I just got a Kickr after years of resisting the smart trainer bug...honestly, the extra bit per month makes indoor training far more interesting/fun versus what is for intents and purposes a 'dumb trainer'. These devices have matured to the point of mostly just working finally.

Honestly....you can pick up a very good old 'dumb trainer' now for a song; and the only difference for your proposed use case is having a built-in power/cadence readout. Honestly, my Fuild2TT I never worked as hard as the Kickr gets me to; and for my pedestrian amateur wattage range it could do the job in terms of resistance fine.