What are your opinions regarding a DIY seawall? I dont want to spend a fortune. I have approx 50' of shoreline that is straight. Considered the bags of sacrete, but looking for other options. Thanks for any advice.

In Forney?

If it's going to be permanent and it's going to take abuse, I would suggest steel-reinforced concrete. How high do you need it?

Have seen many seawalls built with bags of cement. As long as the water never gets behind the cement, there shouldn't be any problem with erosion causing the wall to fail.

The newer walls use heavy gauge corrugated steel welded to metal post that have been driven into the ground. They then cap them off with a metal plate or backfill with gravel and river rock to prevent erosion.

The second idea is definitely the more costly. 80 lb. Quickrete is under $4 a bag at Home Depot. I'm sure you could get it for $3 a bag if you bought several pallets. Figure the bags at covering approximately 1 sq. face ft. of wall, a 50' X 4' wall would need 200 bags. This is assuming the bags are 24" long and 6" tall. Probably closer to 20" long and 4" tall so figure on 250 bags for the example. I think there are 42 bags per pallet.

It would need to be Approx 3' high. I thought about driving sucker rod every 4-5 feet through the bags w/ a pneumatic driver to give the wall a little more integrity. Thoughts?

If the bags break before the concrete can harden, you might cause problems. The bag allows the concrete to form into a block as it hardens.

You might wet the bags before you start driving the rods and that way the concrete would be in liquid form allowing it to retain its block form. I'm uncertain if this would work. Never tried it.

If you use a set back on each row, that helps prevent the wall from falling. In other words don't build it verticle, set back each row about an inch or two as you progress. The wall would look like its leaning towards the shore. Also backfill as you progress. Make sure and tamp the backfilled area. Loose soil is easily eroded.

If you want it done right, get someone to drive galvanized steel panels in and weld dead men to them...that go way back up in the yard. cap it, back fill it....and pour a sidewalk over the top of it. It aint cheap...but it'll be there in 30 years.