Each house is set up in an LLC.Before we started working with our partner, we did a couple of hard money loans for flips, which went fine.

Some lenders may have a minimum loan amount requirement. 

Luckily I only have one rental property in Colorado, but it's my second home where I rent out a room rather than the whole house, so it's really important to me to be able to give reasonable notice to a tenant that isn't working out, since I have to share the house with them when I am there.How are others responding to this? 

A good option to get your foot in the door might be to house hack and rent by the room.

I have done a few successful house flips from complete renovation. 

I've heard of some hosts adding to the house rules that the guests must complete those steps after booking on the OTA platform, otherwise the booking will be canceled.At my company, we don't do background and credit checks for OTA bookings, but we do ask why they're renting a MTR and who will be staying with them.

You are exempt from the "source of income" protection though, which means you are allowed to deny an application just because they have a housing choice voucher, which would not be the case if you owned more than 4 units. 

I found a house with an ADU (coach house) that is legal.

I also have a 240 sq ft house that I do an LTR out of.

But in the competitive Los Angeles market, I had to put up additional cash on top of the deal in order to have my loan taken seriously.