Other than wading in with a shovel and filling up a boat with muck, is there an affordable solution to removing sediment?

My idea of affordable would be under $1,000 and way under that would be the best. I've been thinking about some kind of pump/vacuum system that could be built using a small gas engine - like an old lawnmower engine or something but I don't have the engineering skills.

I wouldn't even mind if it was really slow and took several weeks or was a continuous, on-going project.

There are parts of my pond that are just inaccessible by any sort of big digging machine.

Any ideas?

If you're too scared to throw that bait where the fish are, why did you tie it on?