Most 4 strokes can be laid on at least 1 side. Also, the engine can be transported in the same orientation which it would be in on the back of the boat when tilted. It would be pretty simple to make a bracket to hold the engine in that position.I am not sure if the motor can be moved laying down or if it has to be standing up
If you have 5 of you and you can all help move it then a 430 should be fine, but I think you would need a lighter engine - maybe a Suzuki 20 - as lifting an engine is a one person job because of the shape. It’s that or fit a crane to your tow hitch....







