They are generous on the values so sometime my actual cash out of pocket is less than 15%, for example, I pay 102K for a house that appraises for 108K, the extra 6K they count towards my down payment so I get a mortgage for 91,800 because that's 85% of 108K and I write a check for about 10K.

Many of them treat the home as their own and stay long term.Multi's are nice because they generally produce more cash flow, but do require some extra attention.

It's easy to obtain, costs very little, and doesn't require extra, on-going effort to maintain.

I happened to be someone who experienced this first hand  selling close to 30 towards the beginning of my real estate investing career nd know quite a few peers who experienced the same sale process.There is no way the data you pulled accounts for concessions.

That data is very wrong most of the time.

Fix it up and rehab or flip and then you can pay yourself back and have a little bit extra to push to the next one

Highest accuracy in the business as they actually update their data daily.

For the 4 plex you are spending an extra 80k in renovations (I question your 110k renovation number to get to 4 units - this could be low but I don't know the square footage or layout).

Only tankless water heaters, extra insulation, heating/cooling, etc....

And more photos taken, same photos, and extra photos of any damage.