The draw back to these loans is that they are more paperwork heavy than the other "portfolio" types of loans....but if you have ever received a loan on your primary home, it's likely that you will go through the same type of paperwork here with conventional lending.

Paperwork. 

Most investors will consolidate after 4-5 locations as the paperwork becomes a pain.Every very situation is different, but generally, if you have more than 5 locations (1-4 unit buildings) in the same state/region, you can get better pricing by consolidating.But, if you have say 4 in CA, 2 in TX and 3 in FL, then you will probably find better pricing by having a policy for each state.  

Was there any paperwork indicating a division of property?

You also want to look for HMLs that can make a decision quickly and don't ask for a mountain of paperwork.  

Make sure you have adequate liability insurance and that your tenant has renter's insurance and names you in their paperwork.  

I would reach out now and make sure you have all your paperwork in order as that will hold things up. 2019 1099 up to 100k max or 20,833 if it's just you and you made 100k. 

Some bankers don't get loan approvals in time, others don't get their paperwork done, appraisals take weeks, your loan terms change for the worse last minute and you really need to close. 

Less paperwork than FHA and you don't have to refi to get out from under PMI.

On a side note had a nice chat with one of the goldman sachs commercial paper work out folks.. its coming.