At the end of the day, I will have a new chimney, a new washer dryer (it was a stackable and older), a gently used washing machine and a new tenant who is paying $300 more a month than the previous one.

I wouldn't do that.A gentle reminder is usually sufficient.  

We have an existing business in the countertop fabrication business and need more space to get the automated equipment we need (water jet and line polisher).existing facilities are not what we need (10k sqft warehouse, 1500 sqft + show room (separate or together).we want to buy as we own our current two warehouses (2 units 4k space each).strong reinforced foundation (ideally gently sloping to remove water), 20 ft+ ceilings, 2+ loading bays, low HOA (or water and heavy granite/quartz trash removal included).because this is so large and specific and e-commerce has jacked up warehouse prices we are strongly considering building. 

If I suspect a seller isn't as familiar with real estate investing, I like to gently share these numbers with them and just inform them that this is how I'm evaluating the deal.

The property is a gently sloping hill, with an easement through the top 1/4 for a neighbors driveway, so about 3/4 acre is buildable.

I’ll explain to him again and try to put him down gently and hope that he understands.

I sent a gentle reminder that this was past due.

She might not be fully aware of the risk you would be taking on so a calm, gentle explanation could do well here. 

That is the prison look and you can buff the painted concrete so they have a mirror shine.

I gently asked him not to do that but he just said he was doing it anyway.