Wheel building is a dark art - definitely not something you want to do unless you have the time to fidget to get it right. It’s not rocket science, but very frustrating without the proper tools i.e a truing stand, a dishing tool, spoke tension tool and spoke wrench ofc.
I suspect you would pay around R500 for a bike shop to do this for you which should include tire and tubeless setup, probably a little more.
You need to be sure what your goal is:
1 - You are so passionately in love with MTB, that you want to ruin it by making it your hobby? Start buying the tools, fidget so much that you dont end up riding all that much.
2 - You just want to get on your bike and go? Start build a relationship with your LBS, there will be times your expectations aren’t met, but over time you start to maximise actual riding time, while they hassle with parts, drivetrain replacements, shock servicing etc Be prepared to visit your ATM a lot.
3 - You’re so passionately in love with MTB, that you buy/sell/upgrade equipment every season, before it needs serious maintenance, always leaving it to the next owner to run with? Become a pro trader and understand how trends work to time an upgrade path thats affordable without worrying about 1 or 2. (Ofc you will need to do a little between bush-maintenance, minor things you should understand anyway).
Item 1 will bore you of the sport, Item 2 will make you poor, Item 3 is where the wisdom lies (In any hobby IMO).
