Hi Glen
To add to what Andrew has said.
On my Mary J Ward (kit) schooner, I run Main sail, foresail, jib sail and flying jib, all from one sail arm servo. The Hitec 815BB had about 25kg/cm torque on 6v. When you consider a basic sail servo has about 9kg/cm then you can see that this is big enough for most jobs.
The Masts on MJW run thorough a hole in a deck beam and then down to a mast foot (piece of wood with a hole) glued down at the keel. The masts slide in and out. Water getting into the hole is not a problem.
Masts do not have to be removable. Both my boats are not designed for breaking down. It is a pain in the butt to get them down the lake as I do not have a van at hand.
Over the winter I am stripping down both boats and rebuilding so I can pop the masts off and fold the booms and sails away for transport.
Because the deck beam and mast foot are doing all the work, the standing rigging is doing very little on my model. Mostly decorative.
If the mast foot is mounted onto the deck then the standing rigging will be doing all the work.
I used Dacron cord for standing rigging. I used a mixture of a thinner Dacron chord and braided fishing line for the running rigging. You will also need nylon fairleads to run the rigging through the deck so it runs smoothly.
IMPORTANT you need a line that will not shrink when wet for the standing rigging, otherwise things will get broken, that is why you should not use hemp rigging designed for static models.
Dacron line although white will stain nicely with shoe polish. It also comes in different thicknesses.
You need to decide early how scale you want it to be. You cannot do it completely to scale as you do not have a crew to work the lines, and you may also get some fouling of lines. One example would be some back stays on some boats are removed on the leeward side to allow the boom to go out.
My boat is a long way from scale in detailing, but she still looks good on the water as you could not see a lot of detail 10meters out anyway. You could say it is a 'stand off' level of detail.
When I have modified my boats the Mary J Ward will have a number of other small details not to scale to allow her to be broken down rapidly.
I recommend you buy a book by Phillip Vaughan Williams, well worth the money.
https://sslrelay.com/s84068217.oneandoneshop.co.uk/sess/utn;jsessionid=15477b8365d1550/shopdata/index.shopscriptThis book not as good and not very well translated IMHO. But is has other info that you will find useful.
https://sslrelay.com/s84068217.oneandoneshop.co.uk/sess/utn;jsessionid=15477b8365d1550/shopdata/index.shopscriptTraplet has a bit of a sale on at the moment, so may be a good time to buy
You say you are new to scale sail, but have said nothing about your other modelling skills. Scale sail is not as technical as it seems. You will get lots of advice on here, I have.
If you are fairly new to modelling then go for a simple build. If you have more experience you can get more technical. Try not to get bogged down.
There is one boat I was thinking of not doing as my skills are not up there yet, but now I realise, as I am scratch building, I can build her now for experience and do a better job next year.
Enjoy your modelling, and please post pictures of your build on here.
Good luck TT