Refinancing with Horrible credit

[William Bucklin]

I purchased a single family home with my sister through an LLC. The deal was a single family home. 3 bed and 1 1/2 Bath. I was able to get it owner financed with 25 percent down which i had saved. Purchase price was 29,900 with 7475 down. Making the loan 22,425. The loan is for 10 years with 6 percent interest with a 5 year balloon. So monthly payment is 250. I i used 8500 in private loans with zero percent interest. (thanks family) and about 2000 of my own money. At this point the renovation is basically complete.

So this is the break down:

Purchase Price 29,900

Down Payment: 7,500

Closing cost: (1500 I think)

Owner Finance: 22,425 6 percent interest, 10 year, 5 year balloon, 250/month

Private Loan: 8500, 600 monthly

My rehab Investment: 2000

ARV: Should be around 80K

Total Debt: 30,975 Total Equity: 49,025 After Cost of holding expenses and rehab the total "profit" would be about 35500

So my question is while i've got a good deal and value is it really plausible for me to refinance this for a BRRRR with poor credit? if not what is my best option? Wait until my credit improves or look at alternative refinance options? Thanks, This is my first deal so i'm sure I have not done everything perfect and have missed a few things.

Thanks for your time!