Bought a 5 bed for $19k under ask because I pulled the room comps myself, then spent $11,400 on a third bathroom
Seller had a 5 bed 2 bath, about 2,300 square feet, ten minutes from a commuter rail stop in a mid size metro. Listed at $287k. His whole pitch was a one page sheet showing five rooms at $850, so $4,250 a month gross, and a cap rate calculated off that.
I spent two weekends pulling every filled room listing within three miles. Rooms sharing a hall bath were going at $700 to $780. The $850 listings were the ones with a private bath or an ensuite, and they were sitting. I built the file with screenshots and dates, sent it with my offer at $262k, and we closed at $268k. He had a second buyer who took the $850 sheet at face value and their lender's appraisal problem killed it, which is why I got a second bite.
Then the part that nearly broke it. Five rooms on two baths is a fight. I converted an oversized laundry room into a third full bath, $11,400 all in, and the permit sat three weeks longer than the contractor said it would. That was three weeks of carry with no rent, roughly $1,900 including the utilities I was already paying to keep the place warm and dry.
Lease up: five rooms in 31 days, average $748, so $3,740 gross. Cleaner biweekly $220, utilities averaging $415, lawn $90, insurance and taxes I'll leave out since they're local. I self manage. Net has run around $1,650 a month on about $66k in.
What I'd keep: pulling filled room comps myself instead of taking a rent roll pitch, and never going above two rooms per bathroom.