Valley pan? Is it serious ?

[CarlosT95]

So I recently posted a thread about my repair list nightmare and I've done the suspension part of things but now the engine is left. Took it to another repair shop to get a second opinion they said same thing:
Valley pan leaking
Valve cover gasket leaking
Power steering leaking

They are not sure if the water pump and thermostat are leaking but if I tell them to do the valley pan and water pump and thermostat do have to be replaced the bill will be bigger. All together they quoted me 5900 for those things including water pump and thermostat.

my question is if I replace water pump, thermostat and power steering myself is the valley pan leaking coolant a major issue? My bmw is 2001 X5 4.4i V8 with 238,000 kilometres on the clock!