Overall not a totally bad choice, has the benefit that would be an easy to maintain boat (mostly hose down). 6hp would be a bit OTT (in power and weight) - I had one on a 21 foot boat. Probably 2hp would be more than enough.
Anything that size would be a bit tippy (and going over to be expected at some point) - so the inflatable
collar no bad thing.
Big plus would be if you buy bigger, the Walker Bay is a popular tender