As Nathan stated.... you have solid policies and protocols in place and you follow them.

I do have several S8 rentals, while they are generally performing well, there is more paperwork involved in the leasing and the strict inspections can be quite a pain. 

They also have blanket insurance coverage which is much lower then policies in Philadelphia.

If you're running a large portfolio then you would have policies and procedures.

Understand the local permitting requirements, keep eyes on your property to avoid squatters, and make sure you have a great vacant insurance policy while you're renovating.

In my opinion disclosure is always the best policy in both scenarios. 

Initially I had planned to put it into the stock market but given the policies that the new administration is pursuing, I’m not strong on the stock market at the moment.

With an SDIRA, you can invest in long-term rentals while preserving your retirement savings, but you must follow strict IRS rules:1.

Beyond the bedrock issue, soil conditions can be costly if the property has problematic soils such as too much silt, deep topsoil, or extensive wetlands.You'll also want to know what ordinances are going to affect your budget - things like tap fees, tree ordinances, storm water retention policies, etc.Bottom line is that you have to investigate ordinances, off-site conditions, and on-site conditions before you can even begin to budget your development.

Currently, the maximum LTV for a cash-out refinance on a 2-4 unit property is 75% LTV, some lenders can go up to 80% on a case-by-case basis but qualifications are much more strict (FICO, DSCR, Property Type, Market, etc.).. but it can be done.