Your chance of success is much higher that way.

I will also give them comps / rehab estimates for the property as well. 

Obvious, but maybe the least reliable as it is somewhat by chance.

Economic Timing.According to data compiled by Marcus & Millichap[2], the Portland area has experienced three very important trends since 2010:The average price per unit for apartments has nearly doubledThe rate of employment growth rose from 2010 to 2015 but has since declined steadily, projected to be up 1% for 2020 (estimated before COVID-19)Roughly 30,000 apartments have been built since 2010, with another 5,600 units slated for construction in 2020Most RHA members have enjoyed a solid decade of price growth, rent growth and steady occupancy.

After all expenses accounted for, my Quickbooks is showing an estimated Tax bill of $93K.

You can use this tool to estimate future property taxes: https://treas-secure.state.mi.us/ptestimator/ptestimator.asp

Luckily, I didn’t give my real last name, and I actually live and work in Southern California so there’s little chance this will be linked to me or my case.

Much of this analysis is based on the size of the land, how much it will cost to do the horizontal development, and then estimate the cost of the vertical build and ultimate value (aka "sale price")

Of course markets change and the chances of a profitable flip have changed as well.

We estimated the ARV to be $150-160k.