-------------------------------------------------------------------------------------------------------Recommend you first figure out the property Class you want to invest in, THEN figure out the corresponding location to invest in.Property Class will typically dictate the Class of tenant you get, which greatly IMPACTS rental income stability and property maintenance/damage by tenants.If you apply Class A assumptions to a Class B or C purchase, your expectations won’t be met and it may be a financial disaster.If you buy/renovate a property in Class D area to Class A standards, what quality of tenant will you get?

Many education programs that could be scams promote junk services and the quality of all they sell or promote is definitely junk. 

I’d recommend something like the tenant is responsible for the first $500, $750, or whatever in repairs for each occurrence.

Purchase price: $65,000 Hybrid Fix & Flip, bought, made minor repairs and clean out.

have looked into Batchleads as well but quality of data looks comparable  Check out traceestate.com $0.08 per individual and $0.15 per LLC.

So an identical neighborhood (income, crime, school quality, etc.) can cost you as much as a $100k less on the South side simply because your neighbors are brown or black as opposed to white.this right here is the gem advice.  

All this to say your repair partner is going to be crucial to your success. 

These properties cover my mortgage, allow me to save for maintenance/repairs, and are projected to be worth $7–9 million by retirement.

It's mostly Class A properties, a few Class B.You may find the below copy & paste info useful in addressing your question:----------------------------------------------------------------------------------Recommend you first figure out the property Class you want to invest in, THEN figure out the corresponding location to invest in.Property Class will typically dictate the Class of tenant you get, which greatly IMPACTS rental income stability and property maintenance/damage by tenants.If you apply Class A assumptions to a Class B or C purchase, your expectations won’t be met and it may be a financial disaster.If you buy/renovate a property in Class D area to Class A standards, what quality of tenant will you get?

The property tax savings are going to be in the ball park of 40-60%, but to be safe you should double your expected repairs budget when calculating the NOI.If you have any other questions, or want a more in-depth response, I would love to help!