hello there, every family wants to make its future safe and property is one of the best field to invest in.I think your situation is not that much risky but the main problem is not that you are the only person who is earning but the problem is here that you are on a part time job so may be that put some negative impact on bank and that is why they were hesitating as they are afraid that what will happen if for some reason you also lost your job as their is no job security in a part time job and also their is no fixed income.

So, i think if it is possible for you to switch from part time job to a full time job than you can get your loan with ease and than you can invest in property.