I'm not even sure this is realistic for a foamie

Someone sent me a link to some canned ham camper plans and asked me what I thought about them. I'm posting it here because, at least in my mind, foamies are about being light and thrifty and that appears to be his major selling points. From the listing it is claimed "My trailer cost me about $1000 and weight is about 850 lbs. "
Do any of you see any possible way that trailer could come in at 850 lbs and $1000 dollars? I guess if you managed to buy a vintage camper for $1 and then used the other $999 to restore it, it could be possible on the cost. But the weight is another matter.
For reference, I finally crunched the numbers on my canned ham foamie and I'm sure I could build another one (using new off-the-shelf parts) for $4900. My weight came in at 1200 lbs. That $4900 is for EVERYTHING too; mattress, toilet, taxes, registration, cushions, the whole 9 yards.
My other question is this: How far would $1000 have gotten you on your build? For me, I would have had to stop after building the frame and painting it. (so I would have axles, frame, hitch, tires (used probably) and rims) I spent more than most people do on a frame though. Just curious about how far $1000 is getting most people.
Do any of you see any possible way that trailer could come in at 850 lbs and $1000 dollars? I guess if you managed to buy a vintage camper for $1 and then used the other $999 to restore it, it could be possible on the cost. But the weight is another matter.
For reference, I finally crunched the numbers on my canned ham foamie and I'm sure I could build another one (using new off-the-shelf parts) for $4900. My weight came in at 1200 lbs. That $4900 is for EVERYTHING too; mattress, toilet, taxes, registration, cushions, the whole 9 yards.
My other question is this: How far would $1000 have gotten you on your build? For me, I would have had to stop after building the frame and painting it. (so I would have axles, frame, hitch, tires (used probably) and rims) I spent more than most people do on a frame though. Just curious about how far $1000 is getting most people.