How Chris Lumbu scaled from 55 to 110+ doors using DoorLoop

Too many properties, too many moving parts, and no way to keep up

As Chris Lumbu grew his real estate portfolio, operational pressure mounted. He was managing dozens of units, but the systems he relied on weren’t built for scale. He found himself often trapped under the weight of constant incoming issues. Maintenance requests, in particular, created chaos.

“If you get extremely stressed and have 50+ properties with everybody calling you or sending you text messages like, ‘My toilet is leaking,’ you're not going to remember every single person that called you. It's extremely difficult—first with maintaining customer service, and second, for your sanity.”

Listings were also a major hurdle. Platforms like Facebook Marketplace blocked him when he tried posting multiple properties, slowing down leasing and creating vacancies. Furthermore, without clear accounting visibility, Chris didn’t always have a full grasp of his financial performance.

“I had an accounting issue, and I had no idea how much money I was really making.”

A unified, automated platform that finally put the entire operation in sync

When Chris adopted DoorLoop, everything changed. He suddenly had one system that handled accounting, leasing, maintenance, vendors, tasks, and communication.

One of the biggest shifts came from automating maintenance workflows. Issues that once piled up now moved through a clean, trackable process, even when Chris was nowhere near his office.

“When I was traveling, I received a couple of notices that the HVAC stopped working for five properties. I sent those requests to my HVAC company directly, and they were able to go there and [get it all done]—literally in an hour and a half—while I was still traveling. I didn't have to come back to the office. DoorLoop worked seamlessly. That's when I realized, ‘This right here is legit. I want this.’”

DoorLoop also transformed how he listed properties for rent, solving his previous syndication issues.

“It is top-notch. You post a listing on DoorLoop, and it goes to almost 30 different websites. It's very crisp and they're unique. I love that feature a lot.”

Time regained, stress eliminated, portfolio doubled

Automation took over the manual work, and immediately Chris was free to focus on his top goal: growth.

“DoorLoop saves me approximately 20–25 hours per week, which I use to acquire more properties.”

Instead of being tied to a computer or stuck firefighting maintenance issues, Chris spent more time on acquisitions. This shift led directly to rapid expansion. He grew his portfolio from the mid-50s to 110 doors, attributing that scale to automation.

“My company has grown quite a bit. We went from 55 doors to 110 doors, and it's all because of the automation. It just simplifies everything.”

DoorLoop transformed the resident experience Chris could offer. Faster responses, reliable maintenance, and clearer communication improved tenant satisfaction and retention. The new system didn’t just support growth—it enabled it.