This is only if the bank agrees to sell for less than the amount owing.

OK i have real experince at this having bought CA tax sales for decades..

I wanted to share the numbers and want to make sense if it's a good deal for us according to what we are looking for.Price: $450k (agent said that we can get it down to $420k)2 Units (1 bedroom in each unit)Mortgage with 3 year fixed comes up to around $2.3kInsurance and tax is roughly $400Rent per unit is $1.4k so if we move out then total rent comes up to $2.8kThere's a detached ADU (garage) that can give us another $100-$150 if we rent it for storage and there's a scope of converting it into another unit later on.So currently rough calculation says that it can cashflow up to $300 per month.

Regulation will say you have to be registered and pay hotel occupancy taxes, but your unit may not qualify for registration. 

After looking into it more, I'm concerned about potential tax implications and legal issues, such as piercing the corporate veil.

That’s $30k in taxes. 

LLC without S-Corp status will not give you any more tax advantages.

I utilize a PO Box as well.It wouldn't be hard for our tenants to find out where we live (tax assessor's online tool) ~ But for $50/yearly ... it gives me a bit more piece of mind :)

Getting title and getting clean title for properties bought at tax auctions are two different things. 

If you need financial help, ask under the "Finance, Tax, and Legal" forum.