Especially that I worked more than 250 hours on my properties this year.

Right now, the successful investors I work with are all pivoting to fix/flip and development. 

Or if anyone can suggest any RE agent who is honest, experienced working with investors?

I worked for a US retail company that had a policy of accepting returns no questions asked and even when I accidentally uncovered someone seriously abusing the policy, my bosses wouldn't pursue the matter. 

@Krista Lancedo you work with a CPA? 

Of course another possibility that the work done was subpar and the seller has a legit issue with the billing amount.  

If the landlord or their employee did the work themselves, they must include a description of the work, how long it took, and the hourly rate they charged.

Similar to you my wife and I do most of the work on our properties ourselves. 

@Drake BackmanBigger Pockets is a great place to find a tax strategist specializing in real estate taxation.A good real estate tax strategist can save you thousands of dollars by leveraging entity selection and formation, tax deductions, cost segregations, bonus depreciation and tax planning.I recommend finding a tax  strategist specializing in real estate taxation, business taxation, financial planning and tax planning.Consider working with your tax strategist remotely to expand your options.I would also recommend looking for a tax strategist willing to work with you throughout the year.

How does the Airbnb licensing process work in your area?