We are exploring a construction Loan and home equity line of credit.

If they don't want to or... allow you to hire someone else to handle that end it can be very convoluted and more easily thrown off track requiring more precious time management of the owner!  

@Jackson Wu I have been tracking them for a while, but have had to cancel the last few monhs.

Let tenants know what progress is being made,, and that you will credit the days of non use off their upcoming rents..Download your landlord tenant laws for your state,, this is a disaster not an average repair problem so understand what your rights are and what your tenants rights are.. 

I used 0% interest credit card promo to finance $20k utilities to the property and it still needs 10K to get it in mint completed condition.

This is important to show your lender so you get credit for your payments towards your total DP at the time of closing.This will buy you time to get the rest of the funds, and also lock up the property.If you negotiate a longer Option period than from now to 4/18, you will have a longer time to get your funding in place, and get a larger total DP credit.

I use a credit card that offers airline miles for every dollar spent.

Any other good ways to start out I don't have built up capital and I'm working on fixing my credit to have more options in regards to that in the long run

I have been in the property 2yrs with partial rent credit. lease is almost up.

If you are wanting to buy in Dec/Jan timeframe you should be working with a mortgage broker now to take a look at your credit.