Here's the poor man's ladder(when you have an Ally,why does everyone assume you're loaded?...LOL)
Anyway,I took an 80" peice of 2'' nylon strap(an old wench strap),overlapped it 4" and sewed it together.
You then put it around the swim platform railing and loop it through itself and let it hang in the water.The 2" width is easy on the foot(the only nylon ladders I've seen are 1").My wife wanted another handhold,so a 54" peice of 1" nylon strap was overlapped 2" and sewed together.This is looped over the ski pole.These dimensions are for our heights of 5'9" and 5'7",so you may need differant ones.It's low tech,cheap,and if you forget to take them off,cannot tangle in the prop nor affect handling.If you're wondering if this really works, remember,this makes it easy for a couple of 50+ year old people (who could stand to miss a couple of meals) to get in the GS in deep water.