Yes, and a four-unit is a smart vehicle for it. Live in one unit, rent the other three, and that rental income can help you qualify on future purchases. The property does double duty: a place to live now and a track record that supports the next deal. Two things determine how much it actually helps: - The income has to hit your tax returns. Rent you collect but don't report can't be counted, so the tax strategy of writing everything down to zero works against you the moment you apply for the next loan. - Net matters more than gross. After the mortgage, taxes, insurance, maintenance, and vacancy, the profit is often modest, so the qualifying boost may be smaller than the gross rents suggest. One advantage of your setup: a multi-unit property is far easier to document than renting out individual bedrooms in a single-family home. The units, leases, and rents are clean to verify, so underwriters credit that income more readily. Keep the returns honest and the paper trail tidy, and the four-plex can genuinely lower the DTI hurdle on your next purchase.