It would be very difficult to raise the equity required and do your due diligence up front in that time frame.3.

Even if you get a professional radon test which reads the levels over a period of about 48 hours, they are relatively inexpensive ($150-$250 in my experience).

@Demiss ShippleyHouse hacking in expensive markets is doable, but you may need to be more flexible or more creative.I agree with @Benjamin Sulka, likely in this environment plus being in a high COL, you'll likely not be able to cashflow unless you have a SFH with many rooms that you rent out individually.

Navigating the ownership structure is actually straightforward and inexpensive as well.

What time frame would i have to find land to build on, once approved for construction loan?

For my long term goals, I am thinking for the next 10 to 30 year time frame for my ownership.

Are there any hidden clauses that could be particularly damaging to our finances in the end (if our house doesn’t sell within their timeframe)?

Ohio may be coming up more now than a decade ago because it is relatively inexpensive so you can still find cashflowing properties in decent areas. 

I know all the steps to do it, time frames it takes, and various contractors needed due to working in the building industry for 20 years but would never jump this far in my first time building an investment home. 

What is your ratio and timeframe, for the loan to be called?