How could I determine how much demand there is?

As someone that over analyzes things as well, I’d suggest you step back and think about what your goals are in order to help determine what path to take.I like JD’s suggestion about reinvesting in your business.

It has brought me into a great depression mentally as I have to start all over... but its hard talking and trusting people now.

If so, how is that determined?

.: I am trying to learn and understand... someone told me that its not just size of the home or level of the flip that determines profit, and that in some markets, what is considered a typical profit is 300k based on the 70% ARV formula.

This project will likely be acquired as a SPAC, but those details will be determined by the group of investors, if more than one. 

(i) has not attained the age of 19 as of the close of the calendar year in which the taxable year of the taxpayer begins, or(ii) is a student who has not attained the age of 24 as of the close of such calendar year.Here, in black and white, the law specifies that the determination is made as of December 31st and applies to the entire year.

You are also looking at your desired closing date and determining how much time the appraiser needs and anything else required prior to closing. 

Financially, but also mentally. 

I book marginal candidates in between strong ones to create a scarcity mentality.