In my opinion, $90,000 is too little capital to invest in real estate within a retirement account plan.LTV's are lower when investing with a retirement account plan - Around 65%Meaning if you were to use $60,000 as a down payment, you would likely only buy a house around $70,000.$8,000 would likely go away in closing costs.

I'm now realizing that in the state of South Carolina, the tax rate jumps 2% for rental properties to help fund public schools, a $600/mo cost that I didn't account for when using the calculators in the earlier stages.

Based on what my real estate agent thinks that this quote will be, roughly, and the after repair value, it looks like I could buy this property in cash, spend a month or two fixing the damage, and then put a mortgage for roughly 1.6x what I paid for it and thus have a cash flowing property at a few hundred dollars per month and a little more money in my bank account ready for a down payment on the next deal.

Assuming you sold the home at the end of 5 yearsYour NET ROI would be:0% appreciation: 10.93%1% appreciation: 12.13%2% appreciation: 13.33%3% appreciation: 14.53%This ROI calculation takes into account taxes, insurance, selling costs, repairs (calculated at $3500) through out the lease.

They get an ACH from my tenant in their account same day, but won't do the same into my account.

I just had to take extra money out of my personal account and funnel into my rental account. 

Brian Spears’ account still looks open to me.  

Make sure that your tax accountant understands this. 

My custodian does not have a money market or similar sweep account to keep idle cash earning.

A good real estate accountant can save them thousands of dollars by leveraging entity selection and formation, tax deductions, cost segregations, bonus depreciation and tax planning.I recommend that they find a tax accountant who specializes in real estate taxation, business taxation, financial planning and tax planning.I would also recommend that they look for a accountant willing to work with them throughout the year, who can help them strategize and who is responsive when they want to know the consequences of the financial decisions they are making throughout the year.Good luck.