Same time, I can let her stay til the family find new home but afraid if she keep complain after lease is terminated.As I have another project, I am ok if they live quietly but what will be the choice if the lease is over and tenant still live there?

Without a diligent and responsive professional, touring, offering and closing on a prime investment property of choice is less likely.

You want an accountant who can help you strategize and who is responsive when you want to know the consequences of the financial decisions you are making throughout the year.There are over 20 real estate accountants on this site.

This deal demonstrated our ability to create value through strategic renovations and effective project management, yielding a solid profit and a successful outcome for our partnership.

This deal demonstrated our ability to create value through strategic renovations and effective project management, yielding a solid profit and a successful outcome for our partnership.

I need some advice on which choice makes the most sense starting off?

So, you are left with the choice to proceed as is, negotiate a lower cost, get a concession, or walk away.I would get a quote and request a concession if they aren't interested in fixing it. 

Yes most definitely, however each person are able to acheive 10 maximum conventional loans, so if each properties are applied jointly, then you both would only have 10 active loans/properties instead of 20 loans (10 from each person) So you would want to strategize accordingly and see how you can acheive your maximum potentials and have multiple properties with your partner.

You want an accountant who can help you strategize and who is responsive when you want to know the consequences of the financial decisions you are making throughout the year.There are over 20 real estate accountants on this site.

Since you already decided to go with Quickbooks (good choice by the way!).