Phase #1 - Recovery  - characterized by high vacancy rates and no new construction- rent, during this phase, is flat or declining- owners offer rent concessions to avoid their property occupancy rate from  decliningPhase #2 - Expansions- characterized by declining vacancy and the start of new construction- occupancy improves, concessions are not being offered, and rental rates being to growPhase #3 - Hyper Supply - characterized by new construction and vacancy rates beginning to rise - rental rates begin to grow at a slow rate- rent concession are being offerred due to the new construction in the area [in the hope of retaining current renters]Phase #4 - Recession - characterized by the completion of construction and a decline in occupancy rates - concessions are abundant to avoid high move-out rates Here are some foundational truths about optimizing your investments:#1 sow seeds of success in the down times - "The season of failure is the best time for sowing seeds of success."

Don't forget to add fringe benefits such as health insurance and also payroll taxes, etc. 

I'd consider myself an advanced, tax-savvy, solo investor with quite a bit of experience. 

You can - 1) establish a trust for asset protection, 2) utilize the Homestead Exemption for property protection, 3) consider tenancy by the entirety for marital property (this might just be applicable to California, my home state)4) make sure you have adequate liability insurance for additional protection, 5) think about forming a business entity to shield assets, 6) and have proper estate planning for asset distribution.Seek tax and legal advice from experts in your state.

Make a buy at a Nebraska Tax auction on just the taxes.4.  

Because high rental yields, tax free income, and stable market. what do I have to learn first to start investing on Dubai's rental properties? 

This means 20-25% for a down payment, and it has to be your money that you're using (verifiably in an account that belongs to you).Though there are programs that lend up to 90/100 to first-time investors, those programs usually don't work in Maine due to the rural nature.

I do see pre-foreclosures, pre-probates, and tax delinquencies.

The income (rent minus management) should cover the costs (principle, interest, taxes, and insurance) depending on the property's price point. 

@Loren SouersI'm going to lead with the suggestion that you consult a tax professional and an attorney.Generally speaking, you can put a rental property in a revocable living trust, which can help with estate planning and asset protection.