I started off with 3 houses on a lot and another house two lots down.

I'm sure this isn't looking at the whole picture, but wanted to start a discussion around it. 

Start by going to www.narpm.org to search their directory of managers.

Depending on your finances you don't necessarily need to start with a duplex, but I wouldn't go any more than 4 unit if you're going residential.

A friend in Austin recently added a photo of their library wall, and suddenly they started attracting more “workcation” bookkings.Tailor Your Alt Text to TravelersAirbnb’s AI doesn’t just categorize listings - it also matches them with guest search intent.

I want to obtain more properties through other loan products but unsure where to start.

And after several years you start doing cash out refinances.....If you can refinance one property every 1-2 years and withdraw $200k of equity....that's not taxable. 

Lower Start-Up CostsTraditional real estate investing requires 20%-25% down, making it difficult for many to scale quickly.

I suggest you start with developers in your local area (your county and neighboring counties level) because they would be your most likely partner or parcel buyer. 

Quote from @Greg Weik: Quote from @James Hamling: Yeah @Drew Sygit, I am pretty sure we started the "flat fee" thing.