Get HELOC, use for repairs, but then will have interest only adding on to the already high payment of $1050OrPut repairs on the credit cards, min payment could be similar to a HELOC, and then refinance after repairs into possibly a 30year loan, pay off the credit cards before the high utilization’s destroys my credit score, rent it out for possible cash flow of $3-500, wait the 6-12 month seasoning period and then get the HELOC?

Remember, just because you may have a longer pay period (30 years instead of 15), doesn't mean you are paying more for the property. 

@Jordan Slater I would first start educating yourself then decide what you want to do. 

I don't know if he could be liable for something built incorrectly after the warranty period.

For each property within each LLC, I know exactly how much income and expenses they've generated for any given period of time (YTD is best for me).  

You may wish to use your option period to get a few quotes on the egress window and talk to pros who have done retrofits in the area to gauge potential permitting office difficulties.

If it was already on a month-to-month basis then I would argue that you should have replaced it as soon as the first 30-day period was up.Since it is time for renewal, tell the tenant she can sign a one-year lease or stay on a month-to-month at a higher rate.

Any suggestions on the most diplomatic and financial way to get the rent up at least $100 periodically until we reach market rate.

Metals through the years have low periods.

There are so many great free educational resources online on the details of flipping (and saving on taxes), and even more on straightforward rentals.