Slow and steady wins the race, brother. 

Also, keep in mind that technically you have to live in the personal 12 months (I have done just 8 months before) - so only being able to buy 1 a year will be tough to quickly scale - but is a great steady plan. 

You can always hire people to do these things, but it's not always the same as people who care about you and who you can trust.Next, you really want to find an area with a strong and steady economy, local attractions, and quality amenities.

Steady income (often paid more than the average sales agent earns in commissions), and you can learn what most Landlords never do: how to manage investments. 

Quote from @Elijah Quinones: You need credit and steady income to qualify for a loan.

nothing makes investing EASIER than having a steady, long term job that banks can show to underwriters and be happy to get you  approved!   

I have great credit and a steady job.

Has provided a steady flow of rental income, and a great family getaway.

We don't foresee a crash happening but more of a steady plateau. 

But since you are here asking for more than just basic hold steady advice.