first deal, seller financing, no agent, am I doing too much?

[Miguel Luzon]

Hello fellow BP-ers. I am contemplating moving on a deal in philadelphia. The property is exactly what i'm looking for in a live-in flip/potential buy and hold. The seller is motivated because the property has been on the market for a relatively long time. Its already priced within my budget (asking price is significantly higher than i'd be willing to pay though) and its being sold by owner who i suspect is another investor. Ideally id like to get them to come down about 23% from their asking price and carry a 3 to 5 year note with a balloon payment and around 10% down. This is my first deal and i'm trying to soak up as much info as I can so any insight is appreciated.

1. Is this all too ambitious for a first deal?

2. How do I best approach the seller about owner financing?

3. would I be better off working with a buyer's agent?

4. I'm 100% sure i'd qualify for a regular mortgage but i'd rather seller finance. should i just go with a traditional mortgage instead?

Thanks!