I did it for a number of years and typically picked up one property per year. 

Pick your niche and stick to it.

With more than one unit, the biggest difference is that you have tenants complaining about each other and the property picks up more of the maintenance, like lawn mowing.There is a huge difference when you get to 5+ units as those are valued using the income method. 

Pick their brain.Lastly, I'd make sure their insurance policy names you as an additional insured.

You can read through the forums here, see what resonates with you, then pick an investment avenue that you would like to get into! 

When working with Civil Engineering, Is it best to simple pick on firm and go with them, Or is the 3 quote rule in effect at this stage of the process? 

I just picked up two in MH that will rent for 1800ish, 

So they'll help you pick the finishes and hand you a shopping list and then you do the rest DIY.

Not saying you do not know how to do this, but make sure you pick the right lead source and know what that lead source will be giving you.

Here's how I do my due diligence:1) Portfolio matching: (takes 30 seconds per deal)a) Have an educated opinion on where I think we are in the real estate cycles (financial and physical market cycles)b) Then and only then do I pick the strategies, capital stack, and specialized asset subclasses that make sense for that opinion.