Sorry I have given you more questions than answers but often questions like these require educated guesses as to what will happen in the future.

I'm worried that as I continue to scale, my DTI ratio will make it even more difficult for me to get a mortgage on another house.

Do you plan on continuing to use the BRRRR strategy?

I highly recommend you and your friend educate yourself about setting up a partnership.

My investment strategy is this: Asset basedLong term debtUnderwrite for cash flowAppreciation is a cherry on topEmerging markets Continuing knowledge through education

I'm an Airbnb host, I have 4 that I own, rehabbing 3 more than will be airbnbs as well, after that I don't plan to buy more, just rent and make it an Airbnb, when you talk to the owner you have to explain the benefits of letting you do Airbnb (house continually kept up and clean, great airbnb reviews with solid house rules, I plan to offer to fix any minor issues so he's totally hands off unless it's a big issue with the house).

I'm looking for recommendations of places you have used or continue to use today for your property.

My plan was to purchase a 2-4 unit house and continue to live in this apartment.

Any other thoughts or suggestions as i work to educate myself on this potential area and type of rental?

I call a service for that.The biggest issue that holds people back is a low risk tolerance brought upon them by some paranoid delusion.If you educate yourself enough, you can wind up living your dreams rather than dreaming to live.