I have credit line (called a guidance line of credit) with local bank that funds most of my flips. I had only flipped 3 or 4 when I got in touch with them, but they were still willing to take a risk with me. Without somewhat of a track record, I think getting any sort of 'big money' type financing (like not hard or private money) will be really hard if not impossible, but probably still worth trying to find out more about local requirements for institutions in your area.
My credit line, as I said, is guidance line of credit that then has individual notes and deeds and trust underneath of it on individual properties that it funds. It's like 1-2 pts and then prime +1 interest rate.
Acquisition- 70%- based of lesser of purchase price or appraised value. Purchase price is always the lesser (duh) so it's always based on that.
That's it- no rehab costs or anything.
Recommendation: try to partner with your mom- use her financing sources- do a few with her (2,3,4) so you have a track record to show, then beat the street until you find a bank who will give you something like what I have. I had to call about 20 banks to find mine FYI.