For example, avoid wasting time comparing new construction with sun-soaked windows to basement units with stained drop ceilings.

Avoiding accessive PM fees (personally I recommend most people self-manage)These will eat away at your ROI.

However, alternatives like a Self-Directed IRA (SDIRA), a 60-Day Rollover, or a Roth IRA Conversion can help you avoid penalties.A SDIRA allows you to invest directly in real estate while maintaining the tax advantages of your IRA.

Then I’d avoid capital gains tax in Massachusetts?

But you have to purchase new investment property of at least as much as your net sale to avoid tax. 

Unfortunately experience means you've made some costly mistakes :-) So, to avoid those costly mistakes, when I take on a new approach in investing, I buddy up with someone that already has experience doing them.

Usually, a single-member LLC to avoid filing separate tax returns.

I would avoid the testimonials. 

Hi @Damon Diddit I would avoid Newark at all costs. 

I will not know that until I climb under the house and into the attic etc... for inspectionThe area is close to things and is not in a indicated crime location and has a very nice open lot area on the corner with it but again assuming the tenants stay and lease I am looking at that as a smaller issue..Thanks for bringing up the concerns but I have tried to do my due diligence but do not really know is the analyzing aspect has missed something major.