A similar motor to the Robbe Power 1000 is the model glow motor starters, of which I'm sure it is based on the same case and armature. Being cheap the the savings are made in the brush holders and end-caps being made of plastic and bushed rather than bearings.
On 12 volts and relatively light use the starters will be adequate but IIRC the RPM would be a bit high. I modified a pair to be used on 24 volts by rebuilding the brush holders out of fibreglass and metal brush holders from a blower motor.
A mid range 700 with a 10-12:1 planetary gearbox on 24 volts has gobs of power, the same motor on 12 volts and a 6:1 not quite so much but still very good.
My Nexus Tide which I enlarged by 2.5 times used a 24 volt motor extracted from a marine water pump was excellent as a direct drive with a 100 mm prop turned at 1500 RPM at 24 volts. Moved the boat which weighed 30 Kgs + and the hydrodynamics very nearly brick like with excellent authority.
The earlier post that recommended 1000-2000 RPM is spot on, anything more will either overpower the model or cause huge amp draw on the motor.
The Mobile Marine Motors T12-T24 look suspiciously like the 100 watt scooter motors, but they don't show RPM specifications
which are vital in selecting the correct motor. Guessing here (where is the RPM?) but I suspect the BF24 will have similar spec's to the water pump motor I used in the Nexus Tide.