Where to go after 10 rental properties?

[Michael Lewis]

Hey BP, looking for some direction. I’m at 6 rental properties currently and will hit 10 within the next 18 months. I understand that I can only take advantage of 10 conventional(Fannie Mae/Freddie Mac) investment property loans. How can I purchase more without using hard/private money. Will certain credit unions provide favorable rates on a traditional 30yr fixed loans that are kept in-house? I’d like to begin developing my strategy now. As always, thanks in advance!