Take one of your mortgages and run it out as a 30 year note and you will see a huge amount of change in cash flow. 

An annual election is not a change in method of accounting.

Can provide your attorney with POA to sign for any last minute changes.

If you're looking to buy for Airbnb, run your numbers as if it were a long-term rental to make sure you have a back-up plan should the laws change.

As a listing agent I Never allowed this.....too many “buyers”, after bank approval in 60 days or so “changed their mind”, found a better deal” “yada yada yada”.

Yes, the fact that they recently had to adopt new rules for investors (investors can get no more than 5% of any single property per account, frex) and that even with these rules in place you have to act fast to get in on new properties tells me that they have a pretty popular model.

If the lien is old enough that could certainly change the way you approach things... in these parts that lien would expire 10 years and 1 day from last record date, and if not re-filed you would be in the clear.

Oakland has quite a heft city transfer tax for example compared to other states in CA) you really just need to know how those changes may or may not influence your investment.

If she is insistent on the changes though, you can do one of two things. 1) She can split the cost on mutually agreed items with you. 2) items you don’t agree to split but agree can be changed, she can pay for herself, but the changes will remain after she leaves, and any negative changes or repairs that need to come from her changes will be taken out of her damage deposit.

Change the code remotely if possible from one tenant to the next keypad lock or lockbox.