I would make sure if it was installed in or above a finished space that it had a pan underneath it in case of a failure to eliminate/reduce possible damage.

But, for all the Minimum Wage Slaves that work in the Retail and Service businesses, it made the Rents double and triple at a time of Inflated gas, food, medicine to where my old tenants call me begging for help to find a place to move to.

RE is not a magical business that prints money no matter what.

Most work like this: Rates: 9% to 13% (Most Deals are 11-12%)Terms: up to 36 Months (Most Deals are 6-12 months)Fees: 2-4 points(%) of loan amount paid at closing (Most Deals are 3 points(%))Minimum Loan Amount: $50,000 (For loans less than $250,000 $2,500 minimum fee)Max Loan: 65%-70% of After Repair Value(ARV)100% Rehab Financing Available (Require 20% of purchase price down payment or cross-collateral)Closing Timeframe: 48 Hours - 3 Weeks (Most Deals are 2 Weeks)NO PRIMARY RESIDENCES, NON-OWNER OCCUPIED ONLY, BUSINESS AND COMMERCIAL USE ONLY.

Folks don't go broke taking a profit.That said, if real estate is a long-term business for you, maybe start portioning cash flow into capx so these issues/expenses aren't as worrisome. 

If he makes the pit smaller and install the new pump, then he would guarantee it for one year.This property is in mid-west and I am out of state, so I can't really do it myself.What I am not sure is even if we make the pit smaller per his quote below: Would that solve the failure of the ejector pump?

It really can make or break the success of your STR business.  

.- then we typically have "rent commencement" or when you start paying rent, to be the earlier of either 180 days following lease commencement or when you are open for business.  

Should be no problem deducting this business expense.

Reorgs make it difficult to track failure.