We don't start in the morning and go grab materials at home depot in the afternoon, we have materials delivered and we pay delivery fee, client eat that bill to give way to our convenience, two dozens of 40-70/trip could be avoided but we rather spend time making the 1-2 hour trip to the supply store and work on our clients project, we know 2 hours of manpower is much more expensive than $40-70.

We all have "Mail stories".I would suggest getting a list from a provider that uses NCOA - This will ensure the highest rate of delivery. 

The mortgagee can issue the hardship packet requirements and give the borrower a grace period to deliver said items and upon the grace period expiring along with the failed delivery of items they can deny relief.  

Just make sure that whatever the promise is, you can deliver. I

Otherwise, they have to wait for the soonest delivery and they should be happy they're getting a brand new stove.

Same reason - they can kick back invalid addresses sooner.The ZIP+4 code localizes delivery to a few single-family houses or a few apartments. 

Be wiling to go to the lumber store, do returns, open doors for contractors, be on site for inspections, deliveries, etc.

You will probably need to hire various employees and consultants to work with you to coordinate the plans, specifications, contracting, ordering, delivery, installation, service, and warranty coordination of the modular homes that you purchase.

Material deliveries can be wrong.

In our leases we state that any and all notices for repairs or lease issues must be in writing with reasonable proof of delivery to out addresses (no phone calls or texts).