Yes agree with Gary - there will inherently be initial maintenance on your all timber boats components (it is assumed that the spars are aluminium) depending on the condition as bought - would expect some re-varnishing, exterior hull paint patch touch ups, renew some fasteners which show rust weeps or bends, some halyards and sheets, maybe a stay or two, rudder and centreboard edges and bottoms to be faired and re-varnished assuming they are varnished timber, some pulleys and blocks renewing if the sheaves are worn or chipped, sails - take to local sailmaker and have his apprentice repair them. The rudder and cboard may need some epoxy high strength filler in local dings. Any fasteners which are compressing the adjacent timber is a sure sign of rot in the timber, as well as dark / black ply under varnish adjacent to fasteners. Numerous fasteners may have too small a washer fitted, or no washers which is no good. Large and extra large ss washers are available, depending on the diameter. Rudder fittings on the transom are a very typical site of this problem.
If the hull is dynel epoxy sheathed and 2 pack epoxy or poly painted this will be a lot better than single pack enamel.
You say stored under cover - the ideal is in a closed shed so wind blown rain or dust doesn't encroach. Any sunlight on the boat will uv damage the surface coatings and timber. Any water and dust getting into the hull will make mud and resulting rot in the timber. A tarpaulin over the boat on the trailer, open at the bottom to breath, would be ideal.
If the standing rigging has not been renewed for (say) 10 years then it probably should.
There is surprisingly little information on the web on small ply boat maintenance. See a couple of articles here - a tad wordy............
greatwoodboats.com/HowToMaintainAndPreserveTheSmallWoodBoat.pdfwww.diy-wood-boat.com/Boat_Care.htmlInteresting 3 local articles here;
www.australianhartleyts16.org.au/maintenance/hull-maintenancewww.heronsailing.com.au/Heron%20Buying%20Guide.pdfwww.125assoc.com/Building.aspIf you went down to your nearest clubs sailing Pacers they will very quickly advise on maintenance schedules which for your few weeks per year will be a lot less than the national championship title contenders.
Some web articles talk about a rule of thumb of annual maintenance being "about 10% of purchase price". There would be a wide variation in this............as above depending on the condition at purchase and what the aspirations for the boat were. And what the "bashing" treatment to the boat was in use.
Go buy it and get stuck into it, enjoy it.