Start with BiggerPockets Ultimate Beginners Guide (free).

Ultimately there are some investment companies that vertical integration is going to be a key part of their success, while others vary from no impact to being the downfall.

Ultimately, if your CPA is shutting you down on this, without presenting alternative options, it may be time for an upgrade. 

Ultimately, the buyers agents Broker is the one that will have to approve and sign the form and to some extent, may be out of the agents control to negotiate too low.I hope this helps clear it up a bit. 

Keep in mind your ultimate goal for investment and does buying at 30-40% fit in that goal. 

Ultimately, I think it's less about what model you choose and more about how many times your practice with the model you wind up going with.

I ultimately realized there was very little housing inventory in the neighborhood geared towards families that wanted to rent and I essentially created a new market with $3,000 rentals which has been successful and I am now looking to replicate.

@Flavia Vangelotti sounds like you're in a great spot financially to get into real estate investing if that's what you want to do ultimately. 

So whatever you have been paying for a mortgage would ultimately be positive cash flow to your bank account.I wouldn’t even consider the $150 from renting your current house to actually be real cash flow in your situation.

I have been investing in Toledo, OH since 2009 and owned 2-12 unit buildings and find they are way too hyped (read lots of guys from BP want to pay too much for them) and the reality is residents in Toledo are ultimately seeking a house with a yard and a garage so as soon as a resident improves their financial situation they move into a house.