Recommendations for outdoor storage shed

I have the 8x12 metal shed from Lowes.

After 15 years, it's starting to rust out in a few places.

IIRC it was about $350 back then but....

An 8x12 concrete slab, so I didn't have to use wood decking that rots quickly in Florida and creates a substantial rise at the entry (Important if you're wheeling an engine stand or hoist in and out), and can sag.........cost $800.....15 years ago.

I did get three bids and one guy came to the house in a rolls royce (!) wearing a brown workman's uniform with his name on it, and was the low bid.
The high bid was $1200.
...and that was after I had dug a monolithic footer, cleared roots and put up a 1x4 form.

That sounds nice and solid but more than what I need right now and prices are probably double what they were 15 years ago. I could deal with a rise for the entry with a ramp going up. I'm not sure how wood decking holds up in northeast GA though. I guess I'll stop by the Lowes near my work on the way home today and see what they have, hopefully talk to someone who isn't a moron.

If I can't do something decent for <$1000 I'll just use a storage unit again like I did back in CO. There are a few places around here about 10-15 minutes from my house.