It is a substantial loss as we are unable to fill the airbnb space and the subtenant lease is significantly below market rate.

Yes, it’s still a seller’s market.Depending on who you ask, it’s either a return to normal and everything is going to be great again, or the last gasp at the top of a market cycle before the unemployment/stimulus runs out.Nearly everyone agrees that taxes are going to have to go up to pay for all of the government rescue programs.What kind of taxes and how it affects RE remains to be seen, but it’s not usually good - particularly if they target 1031 exchanges, alter the RE depreciation schedules, eliminate the 25K loss that can be taken against ordinary income, etc.Similarly, we won’t know the effects of the mortgage forbearance programs, and eviction suspensions in some states, until later this year.But for right now, yes, things still look pretty good out there (if you’re selling, anyway).

The feasibility of a retail market will greatly depend on the demographics and traffic count and competition.

Note the private market do not usually take a property that has had a flood loss before.

For the 2 years (2016 & 2019) of Balance Sheet data that I have, the Reserve Fund was used to pay off large net losses (I'm assuming capital expenditures?)

Then you will apply the deposit to the unpaid rent, ensuring you have no losses, and refund the remainder of the deposit, if any.

If a tenant asks for a lease modification because of a loss of job permanent/temp/reduction in hours/reduction in pay.

Often there are some other little benefits like this, parking, outdoor lights, fencing, landscaping (or lack thereof) Cons include loss of control.

What would the loss be?  

I had to sell for a real estate deal, that covered the loss.