You could take the equity and build a site with smaller cabins in a new area to really maximize your cashflow and efforts. 

We are still using all the pieces we bought from those sites to this day.

I tried to google but could only find vacantion-like sites with exorbitant prices.- Is there a kind of person who could help me with pre-sale improvements (roughly saying, to tell me what is worth replacing, improving, etc and what is not,1 to make the house more attractive for the buyer)?

Besides land, infrastructure/site work, and the building construction itself, am I missing any other major category of costs?

I've spent quite a bit of time experimenting with a couple of these sites lately.

Hello all, just made my account here on the site to get some advice.

Is looking online at sites like LoopNet sufficient? 

I've heard of mentees who started cleaning up construction areas on a flip at the end of each work day or picking up supplies at Home Depot and delivering them to the job site.

Another thing I've done is to go onto STR sites, and check out a couple things.

This is what I did for a cabin I built in Gatlinburg:  We took a few royalty-free photos of the area off of the internet, and submitted them to an art site online whereby they make a painting of the photo.