A budget option could be to build your own wooden rig.if u look online u can find alot of ideas.

and u make it as sturdy as you want.

and its a costs alot less then u find in stores.

i wanted to upload a picture of my rig here but i doesnt let me.

If you're planning on hitting 15Nm later, definitely skip the tubular steel rigs (like the cheaper GT Omegas). You'll regret it immediately because they flex and rattle way too much under that kind of torque.

Since you want to be future-proof, just go straight for an aluminum profile rig like the Sim Lab GT1 Evo or ASR 3. They are the industry standard for a reason—they handle the R5 easily now and won't even flinch when you upgrade to the big bases later.

Pro tip to save money: Don't buy a "sim racing seat." Just go to a local junkyard and pull a real passenger seat out of a wrecked BMW or Honda for like $50. It’s way more comfortable than a cheap bucket seat and saves you enough cash to afford the better frame.