C-Corp as unnecessary and not a tax advantage (but I'm a business owner and not an accountant).  

Why is a mortgage necessary when selling real estate with seller financing, but unnecessary when selling a mobile home with seller financing?

Some from unnecessary dining rooms, Others from living rooms that are unnecessarily large.

The bank takes care of reports and I hate unnecessary complexity.

An important part of investing is avoiding losses, and rookie mistakes are an easy way to take unnecessary losses.4) multifamily: I've tried to go with direct ownership in my local Tampa market here for the last two and half years and not been able to find anything that cash flows as well as I can do through syndications/crowdfunding multi family.

I have my real estate license as well, but am getting hit with unnecessary fess from (Century21).

Its almost imposable to find a lender like that.

There are a number of purchase/sale/holding costs to look out for, that I compiled into this post here: https://www.biggerpockets.com/blogs/8814/70530-fix-and-flip-project-costs-purchase-sale-and-holdingI see that you're located in South Dakota, so in addition to those costs you'll also need to contend with the Contractor's Excise Tax, which is a 2% tax imposed on "prime" contractors engaged in "realty improvement projects" in South Dakota.

A quality PM is CRUCIAL in preventing unnecessary losses at a property and can save you many headaches and unnecessary expense.

And in the case of imposing rent increase limits, I wouldn’t be surprised for the city’s landlords to make a HUGE jump in rent prices immediately before the measure goes into effect.