Good pro tip is to not tell the tenants you're moving into next door that you're the owner but just affiliated with the property manager.

4.Tips to avoid similar issues in the future?

Cheap items will break sooner and require replacement, and will make your place look cheap overall. 

Quote from @Mike Lambert: Quote from @John Underwood: I would replace the mattress or replace the sofa bed.Also a 4 star review is still considered a good review.

That does not mean you or the seller have to replace them.- HVAC, the rule is that if it is working you may not have to replace it but count as a capex in the coming years.

Any tips to get a better rate or deal from lender ? 

There are types of deductible debt: - Acquisition debt (a loan to directly acquire an asset)-Renovation loan (loan against an asset, used to renovate that asset)-Replacement debt (a loan which is a refinanced replacement of an initial qualifying replacement). 

Any tips?

Any tips on agencies that better fit a sales agent just starting out? 

I would also appreciate any tips/must-knows when looking to purchase triplex/quadplex properties in the phoenix area.Thanks!