The context may be estimating the duration of work for two tasks assuming the 27-hour task is dependent on the completion of the 48-hour task.

I have worked 17 hour days when doing rehab on houses, but that has been in short duration.

The house burns down, and the loss is covered, and the insured has loss of use coverage, the policy would provide coverage for reasonable alternative accommodations for the duration of reconstruction or up to the coverage limit) 3.

The answer to my 3 part question would then be - a) - 10 vacancies/mo x 12 months x 5 years = 600 vacanciesb) - 90 non-V/mo x 12 mo x  5 years = 5400 NVc) - Yes (if no)In order to participate, you must have had at least 5 doors avg/year over the last 5 years.I play but will up front state I have 2 units down due to fire since Oct (and construction has been stopped) but we had lost rent insurance so they are the same as rented and will be counted as rented.  4 of the vacancies were extended duration due to rehab, but I will count the entire vacant period.18 units, 16 LTR units. 

IMHO you can have an income requirement that requires funds equal to the duration of the lease term (which could likely be around $50k or a little more than $4k/month for one year) as part of your policy as long as you apply it consistently.I personally wouldn't use that type of income requirement.

Everyone will think the rent holiday is for the duration of this, whatever this is. 

Letting one tenant off the lease would have no impact on the security deposit,the deposit stays with the remaining tenant for the duration of the lease.

Any insight as to whether or not I should just keep this month-to-month agreement or have them sign for a longer duration?

I would honestly recommend looking into EXTREMELY short-duration type bonds if you want something that will give you a higher yield than a traditional bank, OR if the market scares you (even though there are varying types of bonds - some that are even backed by the full faith and credit of the US Government), you could put them into different types of no-penalty CDs or higher yield money market based accounts.

As others have mentioned, if the tenant already has furniture they're going to start to factor in the cost to rent a storage unit (if they like their furniture) during the duration of the lease.