Quote from @Melissa Stanley: A "cosigner" is someone that is financially responsible but not an actual occupant of the rental.

Not enough information here to answer this question accurately.Is the home a total loss? 

Not sure if they have upgraded to desktop appraisals but if they are still doing in person appraisals , make sure you get everything (scope of work, good faith deposit, social, LLC docs, insurance, proof of prior experience, financial statements) in ASAP.

They sold and realized a large loss. 

To give you some hope, in the mean time of your RE losses, many of us are doing very well. 

My background includes project management, financial modeling, and launching a real estate private equity fund.

I'm glad you have an umbrella policy for the first 10, but when you own them in your own name, a loss in one property can spill over to the others, and personally.

Learn the basics of financials in RE, build a strong team on the ground, understand the ins and outs of RE and what market your in, understand how to actually flip the home and what strategy you are doing (Highly recommend the BRRR) as holding homes is where the money is made. 

Long story short if you are worried about the deductible, I would not considering it's meant for a total loss situation.

Guess I had the one in a million situation and loss 30K on this transaction.