Sorry to hear of your fathers passing. I lost mine in 2008 and while one never gets over it, the memories you have of him will help get you through it.
I've had my Eagle for the last two years and through this site, there's lots of knowledge to help you get it running and reliable again. From the experiance with my 83 Eagle, if the critical parts (Drive Train, Body) are in good working condition getting it dependable could be as easy tuneups, rubber part replacements (water hoses, vacuum hoses, belts) adjustments etc.
Being optimistic, the starting issues could be ignition or fuel related, power steering issues could be just a leaky hose, pump or steering box, transmission slippage could just be an adjustment.
Being pessimistic, yeah could always be a lot worse. I've put about $2500 into mine over the last 2 years which included radiator, most of the hoses replaced, alternator, transmission rebuild, belts, battery, tires etc. But then again its almost 30 years old and some of those parts have to be fixed/replaced normally and the car apparently sat unused a lot of years.
Lastly, an egg to Eaglefreek in advance for his offer to look it over..