I will insure the property as a non-owner occupant. 

Leverage technology early and put everything in the cloud, so you can access info wherever you are.Make sure to get properly licensed and obtain E&O Insurance.

When I filed a claim, my insurance company denied it because the property was under rehab and not rented.

You should have a good idea of every expense you have in your primary home, then add the STR specific:  (These are rough estimate numbers, depending on various factors)STR insurance - a special insurance that covers both the property and your liability, could be $2~4k in areas without natural disasters, could be more than $10k in some other areas.cleaning fee - approx. $50 per bedroom, so a 4-bedroom house will cost you about $150~200consumables - bathroom supplies, kitchen supplies, beverage supplies: $20~30 per week, depending on how much you providewear and tear - towels, linen, kitchen utensils, some furniture: $1000~2000 per yearRepairs/replacement for things that guests break or steal:  $1000~2000 per yearAlso, if your personal use is less than 14 days a year, the entire property's expense is deductible against STR income, but if you use more than 14 days, then you will have to calculate the proportion of how many days it's rented out vs how many days you or your family uses. 

You should allow a 1-2 Weeks for the appraisal, and 1-2 weeks for title and insurance.

But IRS allows an IRA to be invested in anything except life insurance and collectibles.

My duplex - built 1989, 2,060 sf, 2 bed/bath, 1 year old roof, value if I subdivide (county already approved) and sell each separately $150k each ($300k total)Investor duplex - built 1995, 2,300 sf, 2 bed/bath, 5 year old roof, value around $310kThe investors initial request was for an equal trade and they would pay realtor fees, which I replied wouldn't be equal due to buying/selling costs (recording fees, title insurance, closing fee, survey, inspections, loan fees, 1031 fees, accountant fees, repairs), taxes would increase due to new sale price, I'd trade a 3.75% mortgage for a higher one, and I'm on the 10th year of a 30 year loan so resetting that to a new loan would restart amortization and pay more towards interest.

-Paying all the taxes, maintenance and insurance-Finding a renter-Worrying and wondering each month if the tenant will pay on time-Fixes/repairs-Other? 

Also, keep in mind if it causes an undue burden on you or is too costly you can deny them. for example, if your insurance company says that dog breed is on the ban list then you need to find out how much it will cost to insure them. if the rates go up because of the dog then you can deny them based on the undue burden. 

Calculating these losses involves documenting the fair market value of the property before and after the disaster, adjusted for any insurance or other reimbursements.