Great question and thank you for posting it here. My colleagues offer some great insights. My recommendation would be to contact a handful of mortgage groups and get some direct feedback from them. They will take a look at your credit and factor in elements such as you/your parents debt/income ratios and provide you some feedback on what might be doable. It is also a nice step in the home search process to understand what your pre-qualified for and what you would need to bring to the table in terms of equity to help establish a budget for the purchase.
I would be happy to simplify the process of contacting various mortgage providers. Let me know if your interested and thanks again for posting the question.
Many private investors may consider it, some specialized in them.
Contact me if you have questions,