Best part is you wouldn't even need to find the buyers, more money if you did but good chance you don't need to.Anyway give it some thought & good luck to you as it's a much more sophisticated way to learn.

Unless you have some kind of massive access to capital, you're going to be automatically overleveraged, exposed to significant risk of liability, and subject to a substantially higher degree of sophistication in your dealings.

If you want something more sophisticated you can check at sales and marketing saas productshttps://www.impactbnd.com/blog/the-10-must-have-saas-marketing-tools-platforms

-Private Equity/ Venture Capital: Investing in PE is not for all as they are not simple to find and understand but for the sophisticated (and wealthy) investor you can get into some great PE funds that can produce some huge returns!

My sophisticated emotional acumen provides me with explicit insight on my clients needs and wants, and my insatiable appetite for all things Music City keeps my finger on the pulse of every neighborhood in our expanding urban core.

@Robert ZabelYou can buy them at sites like getrefm I think they may be $500-$1000+ but these calculators are very sophisticated.

I dont say lender because we  only JV but we bring the type of capital your talking about.so private capital that is sophisticated enough to go into spec building is not going to be any cheaper than HML and could very well be more.It can take some time to find banks that will play but it can happen as they are getting back into the game.If you have the three C s and track record I would be pounding on every small commerical bank in the Vegas area.But franklyright now bank rates for  me are 6.5 and 1  no junk fees just appraisal and I only have to appraise one model if its going in the same community. 

They were probably just hoping you would not be sophisticated enough to call their bluff and are trying to scare/blackmail/extort you into paying their ransom fee (and randomized the number to make it sound more official).

There are motivated segments that aren't sophisticated and could be overwhelmed at the idea of doing everything they need to do before listing their house. 

So they started a sophisticated grow operation a few weeks after your rep saw the basement?