With rig tuning there is nothing much to worry about. There is a device called a Loos tension gauge for $250 and associated instructional videos on YouTube. The Compass forum has it for hire to members with a link to the video(s):
sites.google.com/site/compassyachtgroup/loos-rig-tensionerThe gauge will help you tune your existing rig. Whether that highlights improvements in hardware is unknown, but you can make the most of what you have (i.e. get correct tension on existing rig) and only later think about budgeting for renewing the rig and sails. I have a 28' yacht, and renewing all my standing rigging, i.e. the wires to the mast, cost about $1800. That was nine wires (4 inner stays, 2 backstays, 2 side stays and forestay), with some pulleys renewed, etc. I did the inner 4 stays myself out of galvanised wire and used an $80 swage tool from Bunnings. The rest the boatyard man did. Cranage was $150 each way extra, as I left the mast horizontal for a few weeks while he did the work.
Some people do advocate for galvanised rigging on the basis of cost, and DIY, but with the trade-off that you need to renew it within ten years, whereas the usual route of stainless rigging will last up to 15 years. Your choice and your budget. I could get shot down for suggesting galvanised rigging, but I have done it several times, but on rigging up to 5mm diameter. For a 26 and then 28 foot yacht.
Sails can cost up to $2600 for a furling genoa for the above yacht, or can be cheaper using Fareast Sails in HongKong. Otherwise some 2nd hand sails are available on Ebay, etc.
The rest of your yacht can be done bit by bit as funds and time become available, and as you see the need for improvement.