I built a 8'x12' 14' peak and 8' eaves, metal roof and harde panel siding, 3/4" pressure treated floor
6" floor joist into 8" frames on concrete pads, the floor is about 14" off the ground with a ramp @ 15 degrees, cost about 1100.00$ in materials,
It will be there when I go (not withstanding a tornado) as Hardee panels are impervious to water and rot and the whole structure is PT. Because it's on pads I could move it with my tractor if I had too.
I would send pics if anybody wants to see them. Yes it was some work to erect but I did it myself and everytime I look at it I smile. If it was a metal or plastic shed (don't see any metal sheds for sale around here) I would look at it and see the deterioration. Would not consider a prebuilt shed, but that's me, here. Anything that's not pressure treated quickly becomes a termite nest. So you will be repairing or replacing in 2-4 years.
Build it yourself. It's not hard, it's fun:thumbsup: