Meet the Cook Brothers
DSCR loan specialists at Cornerstone First Mortgage. On this site we work only on investment property loans, and we specialize in rescue closings where other lenders fall through.
Built for Real Estate Investors
Tanner and Zac Cook are DSCR loan specialists at Cornerstone First Mortgage. This site is where they handle DSCR investment property loans, the rental-income financing real estate investors use to buy and refinance.
Their mission is simple: help real estate investors close deals that other lenders can't — especially rescue closings where a deal is about to fall apart because the original lender dropped the ball, ran into underwriting issues, or couldn't perform on time.
With access to multiple non-QM investor programs, the Cook Brothers price each deal with the investors whose guidelines fit it and lay the rate, fee and term trade-offs side by side. Whether you're purchasing your first rental property, doing a cash-out refinance to scale your portfolio, or need a lender who can work to a tight closing deadline, they'll look for a program that fits.
The Team
Two brothers, one mission — get your DSCR loan closed on time, on terms you understand before you sign.

Tanner Cook
Mortgage Loan Originator
NMLS #2090424
Tanner doesn't miss a detail. He combs through every file and cross-references it against the right investor's guidelines to make sure nothing slips through the cracks. That precision is what keeps deals on track and closings on time.

Zac Cook
Mortgage Loan Originator
NMLS #2111496
Zac is the creative problem-solver. He works closely with every client so they know exactly what their mortgage payment and down payment will look like before they commit — no surprises, no guesswork.
What Sets Us Apart
We're not your typical mortgage company. Here's what makes the Cook Brothers different.
Rescue Closing Service
When another lender falls through, we prioritize the file and map out whether a program and timeline can still meet your deadline. Saving deals that are about to fall apart is our focus.
Multiple Investor Programs
We run your scenario past multiple non-QM investors and show you how their options compare. One application, several programs weighed for your deal.
Built Around DSCR
Everything on this site is about one product: DSCR loans for investment property. Investors get loan officers who work these files every week.
Straight Answers on Who Decides
Each loan is underwritten under the investor program it is placed with. We tell you up front who reviews the file, which conditions they need, and how that fits your timeline.
Program Snapshot
Licensing & Compliance
Cornerstone First Mortgage, LLC is licensed in many states and operates under state and federal regulatory oversight. Our state license list is on the Disclosures page.
Cornerstone First Mortgage
NMLS #173855
Tanner Cook
NMLS #2090424
Zac Cook
NMLS #2111496
Equal Housing Opportunity
We are committed to providing equal access to housing and lending services.
Verify our licenses on the NMLS Consumer Access website. NMLS Consumer Access is a free service provided by the Nationwide Multistate Licensing System.
Ready to Work With Us?
Take 60 seconds to see if your deal qualifies, or call us directly to speak with a DSCR loan specialist.