Using the same example from above they will finance up to $70k if they purchase and repairs are $77k or more.

That's one example I could think of. 

As Anthony mentioned above, the (presumably) typo is causing some of the major numbers I'd look at to be off, for example, the Cash on Cash ROI.

You'd be best served typing in google the county and opportunity zone, for example.

See example below for one where a bathroom was added.to Get licensed in Dallas as a GC, you just go to the city and pay the fee, and then pull a permit to do demo and rehab. 

For example, if you are working with an attorney and they're providing legal advice it's best to not use that individual as your QI.

On another note using the same example as above - For cost segregation, I heard that generally the upfront depreciation it can generate (after having engineers appraise the building) is roughly 20%-30% of the purchase price.How would that work?

Yes - your share of income/losses passed through to you will be income less expenses which includes depreciation.A simple example below is you put $1,000 into a deal for 5% interest of a real estate deal.

Here is an example of one: https://www.zillow.com/homes/for_sale/157725954_zpid/33.423027,-111.886104,33.419346,-111.889537_rect/17_zm/1_fr/ 

For example land values make a significant difference in my neighborhoods, other places it could be garages, or bedrooms.