Rockin' G Ranch ,
The reason that I recommend the do it your self principle is there is a great mark up on parts and labor.
You save money, you learn something, and can be proud of the fine job you did.
This is all assuming that you have the ability to round up all the parts and understand the operation of each and have the tools and time to do the job. If someone does the job for you, you will have learned nothing except to pull the levers.
If you do it your self, you will have taught yourself something and will know how to operate and trouble shoot the system if needed.
Some people just have unlimited money pockets, and can afford to have someone else do it for them.
Just add up the merits of each method and decide for your self.
You can custom make a stack valve set to do the exact job you want.
Sometimes it is easy, and at other times extremely hard.
Basically it is a
What do I want the valve to do?
How many spools do I need?
Where shall I put it?
What are the fittings size and thread type I will need.
How long should I make the hoses?
You will need a hyd gage to set relief pressure.
You should measure twice and order once.
Try this site for hoses and fittings
DiscountHydraulicHose.com
Stacked valves
Surplus Center