Regardless if a price of a property is high, I learned that sellers are humans and they will react and sell a property based on how they feel.

Pay the bill yourself, then reimburse yourself by charging the tenants based on a formula.

HI Mariya, My team is based in Orange County.  

Dwayne,It is unlikely that anyone can give you an accurate comparison based on just the info you gave. 

If you dream of owning on the Coast be very cautious of regulations against STRs, most communities are not STR friendly and some towns have revoked STR permits (lawsuits galore on that), so talk with an Oregon Coast based agent who KNOWS STRs or you could end up with an investment you can't rent and just have to wait out all the expenses of ownership until the appreciation kicks in.

. $10k for a roof (at least here in my area) would be pretty low for most triplexes unless its a small area and no gables/valleys et) A new sewer line to the street often based on total length.

Those use a AVM based off Zillow or electronic records on file.

Within the nonQM space there are products like DSCR, bank statement loans, P&L loans, asset based loans, etc.

I would recommend first establishing what your financing options are based on your cash on hand and cashflow expectations....  5% down? 

The 5 year proforma by DEFINITION is based on a whole slew of assumptions about a whole host of issues in the future - national economy, local economy, interest rates, cap rates, rental rates, political and geo-political factors.