Where i am getting nervous is that i beleive i bidded it correctly in total but on the scope of work aligned it incorrectly per item.

My intention is not to rip someone off, I don’t know how to navigate this situation and am looking for help there.I’m looking for clarification and justification on an itemized invoice for the nearly double expense that the biohazard company is quoting me after the work was completed for a small room and a moderately small stain. 

I then spend about 4 to 6 hrs reverse image searching each item to find the cheapest place to by the items. 

Did you provide itemized list of damages.

The seller normally will not negotiate on that item because it was obvious to the buyer before the offer was made. 

However, there were some items he couldn’t confirm without a more thorough inspection and input from his subs.These “contingent” line items include things like roof replacement, HVAC replacement, and plumbing servicing.

It's one of the easiest diligence items to inspect.

It also helps that I inform my guests that a starter supply of paper and plastic items are provided and ask them to replace any items they have used up. ( This may not be popular with others but I have never had a complaint and for the most part,  items used are replaced)

I like the POD idea if the savings offsets the shipping costs.Big items ship directly to the house and pay a handyman or similar to receive the items.

.), you're often limited to $25,000 of passive losses per year—and that phases out completely if your modified adjusted gross income (MAGI) exceeds $150,000.Real Estate Professional Status (REPS) or the STR Loophole: To use rental losses to offset W-2 or other active income, you must either:Qualify as a Real Estate Professional (750+ hours, primarily in real estate) and materially participate in the property.Or, if it's a short-term rental (average stay under 7 days), materially participate (100+ hours and more than anyone else) to convert it from passive to non-passive—even without REPS.Standard deduction vs. itemizing: You mentioned your CPA said deductions didn’t help due to the standard deduction.