How much equity do you have in the condo? It might make sense to sell it. How much do you owe your father? Hard to say how many years you will be paying him off at $300 a month. Also, depending on what the condo costs a few months without a tenant or a major repair (assessment) and you're pretty screwed.
Your emergency fund looks low. Does 15k cover at least 6 months to 8 months of expenses?
Personally, I would probably put $50-100 a month for each kid in a 529 because with $120k in loans that is a deep hole. I'd like to see myself building something for my kids.
And yeah, you probably should have sucked it up for a few years in private practice with 180k in loans to pay off.
http://money.msn.com/retirement/retirement-number-is-8-enough
Here is one calculator for where you should be now & where you might need to get to for retirement.