They wanted to make a partial payment because dad has Cancer & is without food. 

Finally, certain types of property are specifically excluded from Section 1031 treatment.

They were cancer causing chemicals.I think your best way to figure it out is to ask the current owners how much they're paying.

And if we are too far from the city and we’re forced to use our own water treatment facility and sceptic tank what’s the pricing on this?

They are saying that the windows will take extra time and treatment, and I understand that.

The way the opportunity zone tax code is worded now is that if the investment consists of a mix between capital gains and cash contributions then only the portion relating to capital gains will give rise to tax benefits (i.e. pro rata treatment, cash contributions would dilute the benefits)If you have any support for the post tax cash investments being allowed let me know!

In the latest group we took over, existing tenants were traumatized by a recent bed-bug infestation (thank goodness the treatment appears to have been successful).

One can is typically enough for a couple treatments for a small nest.Even if you decide to pay for it, do not lower the rent.

My handyman husband passed away of lung cancer almost 3 years ago and left me limping along with a needy property. 

Often, i draw inspiration from my younger brother who passed away to cancer, years ago.