The new tenant has credit score 625 and doesn’t have rental history.

If you're just trying to see if the refinance is going to make sense and benefit the client, you really just need a copy of their most recent mortgage statement and their credit score.   

We had a fire/landlord policy with Norfolk and Dedham insurance, however after my last tenant and last property manager allowed my property to get into a state of severe disrepair, including water damage from a dishwasher/septic backup, which was never remediated, my insurer dropped me from coverage as a "bad risk" (we had made a claim for the water damage by the tenant).

I got an invitation for a business line of credit through Chase (I've had an LLC for about 2 years and was building up my credit). 

Recently my friend found one $640k, bad schools, $370 HOA/mo, rented out for approx. $3500-3800/mo, not able to cover the mortgage. 

Better to have it vacant then have a bad tenant put in.

@Dolev Shemesh, it could be a good opportunity, could be a bad one.

A few questions that may help everyone in the forum offer more targeted advice:What is the 67k "non-mortgage debt" is it from a credit card or student loans, what is the interest?

Ideally, they would have access to a line of credit, or some type of loan for misc purchases. 

The package passed the Senate and received a lot of news coverage because of it the Child Tax Credit that would have benefited tax filers with kids.