Better yet, negotiate to take over their position.

I am not in a position to pull the trigger within hours.

My wife and I began to spend more freely after we both retired and realised we were then in a position financially to be able to afford to do so. 

Then evaluate your financial position and what you can contribute to the purchase.

What type of impact/hookup fees does your jurisdiction have?

I think it is still a good deal and will positive cashflow to about 500 net after all expenses including PI payment. 

But most that use your water usage will use your wet weather usage to try and minimize any impact from irrigation.

This makes sense if you can still make it cash flow positive or even break even in the beginning.

I couldn't sell it in time. after moving into the apartment and having this rented out we should only be paying 38$-100$ each month in "rent/mortgage". that's our goal. so that we can save money quickly pay off debts and eventually move out of the duplex and continue to buy more rentals. once we move out that house will be very cash flow positive and we will be selling said single family house unless we have a very good tenant but even then it's to be sold within 3 years or ill have to pay capital gains taxes thanks all!!

Of course, in his position, he will be tempted to use the cheapest materials and to work as quickly (i.e., sloppily) as possible.