You can pre-screen them for free, then run the credit/criminal background only for those that pass your initial review so you're not wasting time.

I've got about 7k in an emergency savings account.I am in the process of getting several mortgage pre-approvals to compare fees and get an idea of how much home I can realistically afford.I have yet to find a buyer's agent/investor to help me identify potential homes but will start on that shortly.Ideally, I would like to buy a single family home.

The first step is talking to a lender and getting pre-qualified.

Acquiring pre-existing rental portfolios?

Is there a specific duration I should be pre-approving an inquiry within?

You've signed up for one PIA if the owner is still in the house.One way to tippie toe into this is to hook up with short sale agents and start working with them offering to door knock the NOD folks. 

Start by getting pre-approved to know your budget and show sellers you're serious.

For smaller investment amounts, we often see investors providing private loans or notes to other investors for their projects, which can offer attractive returns with the right due diligence.

So, the question is not whether to invest remotely, but where to invest.Investment TeamRegarding properties in distant cities: While books, podcasts, seminars, and websites offer general knowledge, you'll ultimately purchase a specific property in a specific location—each with its own unique conditions.

Since you’re pre-approved, weigh the costs, risks, and rewards of each market before making a decision.