Just go through them, select the renovated/closely matching ones, and enter them into a model.Here's my fix & flip model, you can see the comps entered and some quick stats below them: Then I use that comp data to adjust the Sale Price in the model to what I estimate it will be (double check the resale $/sf is in-line with the comps), then adjust the purchase price until I hit my desired return level. 

I have no data on this but I would bet most of these offerings are not scams in any way shape or form.

The very basics would be getting your furniture and shopping list together, keyless entry like Schlage (with backup lockbox with physical key very close as well), looking into insurance, local taxes for STRs, and moreAlot of ways to save time and make it easier to self manage with a property management software like Hospitable and data research like AirDNA.

Brian Davis: @Eric LoweThere's a company called Rental Property Refund that does cost segregation studies virtually, based on self-reported data from you.

It took less than 5 minutes to enter this data into the BP Rental Calculator and see that the potential was outstanding.

The demographics and map data don't take the students into account, but they're really what's driving the market.Low property values and ever-increasing student rents are a recipe for a market when you can pick up a duplex in decent condition for $150k, and rent it for $500/bed (that's an EGI of $36,000 annually for a 3/3 duplex).

Be careful when someone gives you prospective figures to understand what the data represents.3. 

Economic Timing.According to data compiled by Marcus & Millichap[2], the Portland area has experienced three very important trends since 2010:The average price per unit for apartments has nearly doubledThe rate of employment growth rose from 2010 to 2015 but has since declined steadily, projected to be up 1% for 2020 (estimated before COVID-19)Roughly 30,000 apartments have been built since 2010, with another 5,600 units slated for construction in 2020Most RHA members have enjoyed a solid decade of price growth, rent growth and steady occupancy.

it is technically a real thing but very rare, and there is plenty of historical data out there that shows those who have less skin in the game are at a far greater risk of default by a factor of 5-7x.

UPDATE:I have been putting my data into this rental hero software for a while now and I absolutely love it.