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)?

You can check out sites like Zillow or Redfin to see what houses are selling for and what rental prices look like in your chosen market. 

I bet it’s less than 1/2 the cost of solar to go this route.

. ($1300 for plans if only a wall--I pay $3500 for a site visit by them and close to full gut of kitchen/baths/door moves/wall removals)  Do not skip the permit!!!!  

It's not perfect, but I like to read the reviews from residents on the site 

At the end of the day vet these lead gen sites/companies on a short-term basis, then flip to something else if the leads are not working while having the right expectations.

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.  

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

I watched my parents flip houses since I was little and have always been on job sites or made "pocket money" by doing chores like painting fences or washing kitchen cabinets, which I realize now my parents were putting us to work to build that sweat equity.

Hello everyone,I was wondering what everyone thought on the 2 sites: Propstream and Propwire?