Does this strategy utilizing HELOC really work on saving money and paying off mortgages much quicker?  

So the question becomes based on their individual and personal tax situation what is the estimated tax burden they'd save? 

However, full site visits, though more expensive, maximize tax savings by capturing every depreciable asset and offer better audit protection.While online studies may be suitable for simpler properties, full site visits are ideal for complex or high-value properties.

Eliminate debt, establish a budget, and save.

Are you collecting properties or collecting money?

Good people gave me work, I learned more skill, more money, worked hard!

If you want to take pictures of some of the work you did, you could save that in a Google drive as well. 

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

Prepare financially by saving for down payments, improving your credit score, and setting aside emergency reserves.

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!