I had a Walker Bay 8 just recently, I was going to use it as my
tender in the
Bahamas. But as noted it was too tippy, and getting into it from the
water was not practical. I now have a
Water Tender 9.4 which is much better. I use a 4-1 block and tackle to haul it up on the foredeck, it's not difficult.
But I had/have a Suzuki 2.5hp that worked great with the Walker Bay. It's 29lbs so easy to lift, and it was not too much weight in the transom.
I would have suggested trying a lighter motor first, but you're already past that point.