You can then go from there, crunch your numbers and decide how much you should make offer on the properties.

Do your research, crunch the numbers and be persistent!

Is this that you’ve crunched the numbers and believe that this property will generate a profit in whatever the intended purpose is, or rather that you’ve done a good due diligence.

In the end no one is going to care about your property/tenants as much as you do, but a good property manager will bring experience, knowledge, contacts (e.g. contractors they've worked with a long time and trust to fix problems) to the table and save you time.Regardless of which way you go, you should always factor the cost of PM into your number crunching to make sure a deal works for you - if you decide to manage it yourself, think of it as paying yourself to do the PM.

I don't know nearly as much as many investors on this site, but I have spent many hours driving neighborhoods, crunching numbers, and looking for great deals.

I am trying to crunch the numbers on a few properties but I realized I don't know where to gather a lot of the required info.Also, can you use an fha loan to buy a multifamily home to live in and also rent out the other part of the house?

And the math in that formula is simple - you could easily do it in a spreadsheet.The other points made by JScott should also be considered important - including the ability to sell quickly in the market in the event of some cash-crunch.

Since this is very important, please spend more time on crunching numbers and giving more real life examples. 

I keep crunching numbers on SFRs in an area I'm interested in (3/2/1 ~ 130k, 3/2/2/ ~145k) and also condos in the same area (though 2/2s , some 3/2s, 3/3s) and the $/door/month is in some cases close to double ($200-250 vrs $450-500 for condos).I know there are some negatives with condos - the "special assessments" - can someone give me some real life scenarios that I can use to deter me from going and putting some offers on these condos?

I have been crunching numbers now for several days on hypothetical properties based on prices in my neighborhood and came to interesting conclusions regarding the 2% rule which I would love to share and see what BP pros think.