Know how to take constructive criticism.

I have family in Fort Wayne, Indiana, and my dad (a construction whiz!)

For us selling our own new construction if it drives more buyers directly to us its a bonanza for us and much welcomed.

@Samuel Choi, PropStream is likely your best bet if you don't have access to the MLS, but you'll have to pay for a subscription. 

I have about 140k in cash available, and looking for guidance on the best route for funding the second half of constructing a duplex.

tend to believe everyone is motivated by money; people who are lifestyle motivated think everyone is motivated by the least amount of time expended; people who are risk adverse can’t believe other people are willing to “bet” on outcomes even when the odds are clearly in their favor. 80% of the time (IMO) people who make decisions we disagree with are not making stupid, ill informed decisions or being “tricked”; they just have motivation, needs and desires different that our own.  

You may want to request the construction drawings / plans for the utilities that were installed to help better understand their impact to your property. 

So I got a quote from a local construction company to convert the garage into an ADU, and they said 90k - 125k, probably toward the high end of that range. 125k.

consulting  a civil right attorney is probably your best bet.

My oldest child is going to college next year in a town where I could buy a house for $160k. I've got the cash to buy it outright, then let him live there, rent out the other bedrooms to classmates, etc. And ideally s...