I applaud the decision for a lift, best thing I ever did for boat health and piece of mind.
I'm in NewEngland so same issues with removal and install every year.
I did get aluminum for both lifts I have, I'm on fresh water, , galvy steel was recommended for brackish water, not good mix for aluminum I guess.
Make sure your cables are stainless, absolutely worth the upgrade even in fresh water.
A few thoughts,
In the long haul steel is heavy and the pipes will rust even when galvanized. All this makes removal difficult and messy with rust stains. My dock posts where galvy steel and developed scaly rust in only a few years.
At any rate it's the weight that is the real negative to steel.
If would also highly recommend the wheel set most lift makes offer, this makes it easier to get it in and out.
You can't really lift them in deeper water to move so, if you drag it in the wheels make this possible with a lot less effort. I had a chain and rigged up a low dollar truck winch to drag it in. In the Spring I got a few truck inner tubes and floated it out till in position. Not a pretty operation but pretty darn easy on the muscles.
They are a pain and awkward at install and removal but worth the effort in my humble opinion. As far as the canopy goes, I still put on a full mooring cover because the boat gets dirty sitting open even though it has a roof, the canopy in my opinion really is just protection from the sun beating down rather than weather/ dirt protection.
Price trade off is in the eyes of the beholder.
Good luck,
Randy