I checked county tax records online and all 3 are up to date.

I have an existing  Note (Note 1) secured by a deed of trust in California on a  SFR (property 1).The borrower has agreed to bring in additional property  (Property 2)as a collateral  after Note 1 is completed  as a cross collateral.I will be recording a deed of trust as a cross collateral on property 2. 

By using his/her excellent credit score and tax records, my partner will be responsible to find a bank that could finance 80% of the purchase (namely $1.6M).

For Non-Disclosure states, like Texas, it doesn't necessarily always show what a property last sold for, but if you go to the "Comparables & Nearby Listings" tab, they usually are pretty good about having some comps...at least in Texas...not sure about other states...and in some counties you need to click the "Both" for the Data Set bar, if the default selection of "Public Records" isnt' really bringing up anything. 

If these significant losses are not recorded in LP’s tax return then upon exit (when the property is sold) the LPs will pay more taxes than due because depreciation recapture will apply even if losses were not recorded in prior years’ tax return.

You could consider recording a memorandum of agreement but if you get that far (i.e., the seller is actually open to this) then you'd want to check with your attorney on that idea.

If cash, I just make sure to have them sign something, since there is no traceable record of payment.End of year, if you paid any single contractor more than $600 over the year, you will have to issue a 1099 to that person/entity.  

Don't estimate.Insurance is pretty consistent in most areas for similar properties.Taxes are a matter of public record.Rents are just comps for rent, like comps for sold properties...also a matter of record on the MLS, Zillow, etc... 

ProspectNow claims they are the best because they get info from credit bureaus whereas everyone else gets it from public records.

Talk to them about their record during covid, evictions, and who/how they designed their leases.