The percentage of the projected AirDNA revenue will depend on your experience and credit score.

If you have enough properties, you can ride a tenant issue with the other properties covering the cash flow/expenses of the bad tenant--especially if you have professional tenants who care about their credit score. 

It gives you a livability score and its a good way to gage different areas and what they are like. 

STRs sound like too much work to me.Portfolio income = stock dividends, interest income (from banks, credit union etc), Master Limited Partnerships (Form K-1), Business Development Companies (Form 1099), bonds, interest earned from investing in a real estate debt fund, interest earned from being a private lender

If a tenant passes your requirements—credit score, income, background checks, and landlord/job verification—then I typically charge just the security deposit plus the first month’s rent.

If you make six figures, then i'm guessing the only stumbling block is your credit score.

You'll want to collect research that goes far beyond the documents and reports provided by the sponsor.I'd work my way down this list when looking at the buildings: Specific to the properties: Acquisition Costs, Environmental Reports, Appraisals, Property Condition Reports, InspectionsBecause these are likely commercial properties, much of the value is connected to the tenant, so evaluating the tenant becomes crucial: Conditions of Leases (duration, escalations, extensions), Balance Sheets, Competitors, Historical Performances, Credit Scores, Macro TrendsLocal market factors that you are used to pulling: population density, population growth, unit type inventory and growth (multifamily), median income, etc...Financing terms: interest rate, principle paydown plan, cash sweep options...Offering model: management plan, operations, asset management, exit strategy.Sponsor track record: Every sponsor has a list of the previous offerings within the PPM.

Quote from @Mei Zhu: Transunion Smart Move has an online application and screening that I recommend.Whichever you decide, make sure they provide a full credit report, not just a score.

:Class A Properties:Cashflow vs Appreciation: Typically, 3-5 years for positive cashflow, but you get highest relative rent & value appreciation.Vacancy Est: Historically 10%, 5% the more recent norm.Tenant Pool: Majority will have FICO scores of 680+ (roughly 5% probability of default), zero evictions in last 7 years.Class B Properties:Cashflow vs Appreciation: Typically, decent amount of relative rent & value appreciation.Vacancy Est: Historically 10%, 5% should be applied only if proper research done to support.Tenant Pool: Majority will have FICO scores of 620-680 (around 10% probability of default), some blemishes, but should have no evictions in last 5 yearsClass C Properties:Cashflow vs Appreciation: Typically, high cashflow and at the lower end of relative rent & value appreciation.

If they came aligned, a union, done.