This is, sadly, rather common.

It is important to note that the City’s new ordinance does not alter the ability of common interest communities to prohibit short-term vacation rentals through their CC&Rs or other governing documents and to enforce those prohibitions within their community.

In both cases my wife and I hold the titles in common.

It is very common to buy a duplex for 30k and get 1200 in rent each month .

Water damage is common and expensive.

In my limited experience giving a TA of $$$ at this level of tenant is not very common and suggests they are financial challenged. 

If you'll be occupying part of the property and renting the rest, that also implies it's a multi-family property, which implies there will be common areas that you'll be responsible for maintaining. 

It gives an error message, saying it cannot verify his identity.

Here is the process I recommend for learning how to estimate rehab costs:#1 Read the Book on Estimating Rehab CostsJScott's 'The Book on Estimating Rehab Costs' is a great resource for new rehabbers to learn how to Estimate Repair Costs on 25 common rehab repairs.https://www.biggerpockets.com/store/the-complete-g...#2 Explore Lowes and Home Depot to Learn About Material PricingTake a tour through Lowes and Home Depot (or their websites) and look at finishes materials and fixtures that you will consider using in your rehab projects.

Being billingual is a big plus tooAmerica is a bit different since everyone has a different ethnic background and foreigners are as common as the air we breathe.