If your plan is to rent to college students, then I think it can be wise to have in your contracts co-signed by a parent/legal guardian.

I could also take the money from another source, but wouldn't be able to carry the 2 mortgages on personal loan I don't think.

Hey Emily, I think it is worth it if it is expected to cash flow some in the long term.

Why do you think purchase contracts are so long and have such small print?

One other thing is that I paid a lot in points to buy down my rate which made the mortgage initially expensive… It will also take a while to refinance (a couple years) so I don't want to wait fully for that option eitherIf my tax rate is 30%, is it right for me to think that the cost of paying interest is ~5% instead of 7%?

This means you close your purchase and pray the appraisal with the proposed ADU has the value you think.

I am thinking about moving into a new home in the Bay Area and just got pre-approved for up to $800k conventional financing not FHA due to me owning rentals.

address it, acknowledge it and/or fix it.That's all I can think of now. 

No one would consider that car to have not depreciated yet some people are not noticing the similarities (or not thinking about it).  

@Tip MallickI think there is an international forum but not that many people invest internationally here and probably even less in Thailand anyway.It depends on your objectives (we all have different ones) but didn't you already answer your own question?