Personal view on this one, worth seeing what other Monkeys suggest:
Yes it'll be OK there, but bear in mind what pivots when you operate the steering
Yes pump will have enough grunt so long as you don't put any sort of impedance in the line such as having it smaller diameter, or having lots of additional bends. Be careful of the unions you use to make the line so that they don't have a smaller bore flange/olive/union inside the union.
I've heard that hydraulic hose, like the type farmers use on their machinery, is suitable, but check with the people that supply that sort of stuff, as it'll be seeing engine oil (as opposed to hydraulic) and at elevated temperatures.
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