I can however relatively quickly add up to a 500 Sqft garage.

Some carriers won't allow insured to be a trust, so in that case do it in your company name with trust as additional insured.

Hey Jack,Welcome to the Bigger Pockets community!

@Bhushan Shinkre  Sorry that happened to you.   

Cutting our losses and selling was difficult, but it was the best option given our financial woes.I’d love to hear from others—has anyone else faced something this unexpected during a BRRRR or flip?

My partner and I have ~20 doors in OH, and we are interested to expand our portfolio to Fort Wayne IN.

Leverage your existing equity to invest in smaller properties, such as a mixed-use or retail space, to gain experience and cash flow.

.: Is it legal, per the IRS, to rent my primary home back to myself? 

What you want is an agent with experience who knows how to negotiate, watch your back, navigate difficult situations, understand contracts and law, provides an objective cross-check, etc.

STR it will cost you big.this isn't a difficult job depending on the fridge location.