You can register your STR's at the link @Carrie Foley provided and the current response time is ~2 weeks based on my submissions.

Ask to see a copy of the lease and look for the length of lease, current rent amount, tenant obligations like paying for utilities and adhering to house rules and look for Landlord obligations like things the landlord may currently being paying for (like trash and water)Make sure to have an assignment of the lease and clear language on the security deposit WITH interest shall be transferred to the new owner at settlement.Consider tenant quality - what’s their payment history looked like, obtain rent receipts or bank statements from the seller to review on-time payment history.

As @Joe Gore  stated I've always believed as well that as long as you have a secured interest in the property (i.e. a signed purchase contract AND a Earnest Money Deposit) then it is completely assignable as all contracts are unless stated otherwise in the contract (A HUD 5.0 says you cannot which is why I never use one in my transactions).

CA taxes residents on worldwide income but may provide a credit for taxes paid to other states.

2) How to verify documentation provided by the tenants?

Hey @Vicente Hernandez - Can you provide some examples of what you would consider a "referral type"? 

And yes if you are able to secure the same rates with less or no points, that is obviously a better deal.

And on top of that, in a region like ours where construction labor is an acute challenge, they provide a great solution.

Syndicators will provide references (albeit hand picked), and they can give you their experience.

If we can help provide value or pricing, please reach out to me here.cheers!