How can I retire before I turn 40?

[AJ Harris]

Hello BP family,

I am 29 and in the process of acquiring my mothers Single family home. The current value of the home is listed at around 114-116k range. She will be turning it over to me (everything in my name, Deed, title, mortgage) with about 83k left on the house. It is pretty much a turn key property that I want to rent out as soon as I can claim ownership of the home. I will be acquring about 30k of equity and want to eventually use that to buy a second property and that's where I need some assistance. 

What are some strategies I can use and/or implement to reach retirement strictly off of REI before age 40?

How can I go about properly obtaining my second property with 30K of equity?

What types of homes would you guys recommend buying?

I want to thank all you guys in advance for any advice thats provided.