Advise on anchoring set up.

[captainwireman]

I searched but I can't find so I am seeking opinions (or where to search on this site). I have a 10M cat that needs a windlass, 2 rollers and pins and possibly everything so before I start spending money I figured I would ask the pros.
1 What is the best anchoring technique for multihulls including mild and rough seas in particular two anchor set ups. Are they even needed? How do you set this up for this cat?
2 What would you recommend for rollers (Is their really a difference in price/quality?), chain and rode size and length for cruising in the Caribbean?
3 What is an adequate method for attaching anchor to chain, chain to rode?

I currently have a 35 lb plow with about 45' of usable 3/8" chain, 100' of nylon 3 twist and 3 danforth style, with 100' rode only for one of them. My cat has all kinds of room in the anchor locker so a horizontal windlass would be fine. I would not have a problem saving the money on a manual unless it is true they are not a good way to go.

I am really skeptical and tired of spending money on bad advise from the know it all's on my refit who seem to want to justify their mistakes by making me make the same ones.