Using a recent example from one of my deals, I saw firsthand how inaccurate comps, misclassifications, and unfair adjustments could impact an appraisal by tens of thousands of dollars.I’d love to hear from other investors—have you ever had to dispute an appraisal?

And hopefullt you won't need a traffic light, which costs in excess of $100,000, though you will be required to do a traffic study. 

The SEC claims Fossum misappropriated hundreds of thousands of dollars from the funds by living rent-free in a fund-owned home and having the funds pay for extensive international travel and his federal taxes.

What are you hoping to get out of the extra time, work and costs of having the LLC?

Not to mention the general PHX market has become expensive and people have already been looking for cost efficient alternatives in the northwest and southeast corners of the valley. 

Access to these,  I do not believe requires a license, but it is in the thousands of dollars for access at the level you need.

Bigger Pockets is a great place to find a real estate tax accountant.A good real estate accountant can save you thousands of dollars by leveraging entity selection and formation, tax deductions, cost segregations, bonus depreciation and tax planning.I recommend finding an accountant who specializes in real estate taxation, business taxation, financial planning and tax planning.You may want to consider working with your accountant remotely to expand your options.I would also recommend looking for a accountant willing to work with you throughout the year.

Hosts lost tens of thousands of dollars.

Me having several thousand good reviews help, but personally I would not book a property with 0 reviews. 

Again more cost for you.