I have bad credit, and little money saved but stable income

[Mack Shep]

There is a deal I've found on Zillow that seems perfect for BRRRR or flipping, but I feel like I can't get pre-approved for a mortgage. The house was built in 1908; 2 bed 1 bath; 5000 sqft. lot; 1100 sqft. for 200k and needs some repair. Comps in the area range from 250k - 350k. Unfortunately, my credit score is around a 560-570 and I have 3k saved; so not enough for a 10% down pay for fha. My DTI is around 15% with only car payments and school loans to pay; though my monthly salary is close to 2900$ a month. Considering my options, should I try for a hard money loan, private loan, seller financing, or partnership? Eventually, I'd like to expand the house into a 3 bed 2 bath and turn the basement into an individual unit (to house hack) and go to college in the nearby area. I just don't know which option to research harder into or push for because I feel that this deal will go quick, and starting to feel somewhat desperate.