The bad is the cost and the fact that if you don't put full effort into it, then you just waste your money. 

Can I write off my payment under my LLC if I get the load through my LLC?

If I can not speak directly to the seller and tell them the advantages of owner financing, I am wasting my time writing up the offer.

These ppl can look at dozens of lenders and streamline your process instead of going from bank to bank wasting precious time! 

You don't want to waste anyone's time without getting that squared away

Don't go crazy with marketing dollars in the beginning because you will more than likely make mistakes, which is part of the learning process, so make sure you're not wasting too much money in the beginning. 

Load properties, market them, screen some fake applications, move the person in, accept rent, edit the ledger, enter/track maintenance, how does it handle tenant communication, run all the reports to see if they provide the information you want in a professional manner, etc.You'll narrow it down to a clear winner, then jump all in and use it.

My fear is I waste a whole year fooling around with single family and in the end I learned more about rehabs, but haven't learned many of the skill's I really need to jump into small commercial multi family.

@Rebekah ValdezI do not think it is necessary however, I would want to be certain their are good chances the deal could go through to sure I am not wasting their time.

He has saved myself and my in-laws boat loads of cash.