I have been estimating $125/sqft.

BTW, I'd get another estimate to clear a blockage--$2,500?

Each investor is going to have to think about their own financial situation, the location, asset class, type of asset, specific tenant, and their own best estimations of the duration of the pandemic to arrive at their own policy for how to handle l late or missed payment.

I would estimate our house decreased in value about 10k recently. 

@Jonathan R McLaughlin: I appreciate your response and your estimate of my limited knowledge of history, concerning your examples, is a fair one; thank you for those examples. 

-while a large group of residential tenants are asking for help with rent that is due (this is a bit disturbing in that we have not even passed a pay period for many tenants which shows that many do not have an emergency fund in place) I am getting much fewer requests like this compared to the percentage of commercial tenants asking for help (i would estimate around 6% of our residential tenants so far although I am sure more will contact us soon)-many owners of residential rentals have conventional loans which in my opinion will have a greater chance at qualifying (greater than a commercial loan) for the government programs that I hope will roll out soon.  

I look at the total of my estimated costs including: closing; on both the buy & the sale, holding, rehab etc. then I determine a minimum amount I feel good about making for the amount of time I think it will take to do the rehab and resale.I also look at the risk involved.

But your engineer should be able to come up with an estimate.  

2. 3% loan interest looks aggressive, I would budget 3.5%, have you been pre-approved to get a better estimate? 

I also ship new, affordable (ready to assemble) cabinetry nationwide...if you're interested in a free estimate please let me know.