Conventional loan may get denied? Options?

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Ok so I am having trouble getting this loan approved because of my large deposits in my bank account the last two months. I run a side business selling bulk items from china on craigslist and have made good money around christmas. They want a Letter of explaination stating why ? I also was getting cash from my parents every week as to money they have owed me for a while? I am NOT using this income as what they need to run on my loan so am I in trouble? I don't see how every other aspect is perfect,

Also if i do get rejected what other options do i have house is 45k i am putting down 12k loan will be for around 33k. Should I try personal loans? or what other options? I am holding the property not looking to flip thanks