You can print those as templates, show to your local closing attorney and ask what if any suggestions they would make to better protect you and stay compliant with your local laws. 

Of course make sure you are being compliant and letting everyone get screened and not being discriminatory. - What sort of turnover can we expect?

MAKING SURE THE SOIL IS TESTED TO MAKE SURE IT CAN STAND THE PRESSURE I ASSUME, LAYING THE SLAB OF CONCRETE KEEPING IN MIND OF UTILITIES AND ETC.

All of that concrete rubbish has to be hauled away and new soil brought in.

Land in michigan is less than in texas , north texas.I will give you examples on cost differences.Material prices are the exact same price if not a little less.texas framing price per sqft $2.00plumbing $9500hvac $9500concrete Labor only $2.00 per sqft  Concrete $180yd 5 sackdrywall $10500Electric $8000Ok here are the michigan prices , better sit down.framing $13.00 sqftplumbing $25,000hvac  $20,000concrete is about the same for materialdrywall $20000electric $25000Both quotes were for a 3/2/2 home with 6/12 roof hipPeople in michigan wonder why houses are so expensive , its because of the sub contractors.The plumber only has about $5000 worth of material to do a whole house but yet there still asking for $25000

I'd get a pressure washer and clean the driveway, that way it won't need to be painted again-let it go back to the natural colour of the concrete or asphalt.

New roof, new siding, concrete patio, retaining wall, deck, windows....made it look nice.

The drain pipes were fitted into the main clay pipe and concrete was poured around the edge of it to seal it.

I don't know how fair housing would react to such a compliant.

This was probably just the easiest/cheapest way for them to be compliant with their contractor's license.