Present!
So, there's nothing really "budget friendly" about NFA, but there are certainly many things cheaper and more useful than the machine guns lots of people lust after.
SBRs and suppressors are most worthwhile for sure. Short shotguns and some AOWs can be fun range toys, and destructive devices are cool if that's your game and you have the coin for it, but there's a good reason silencers and SBRs dominate the registry. Incidentally, they are the 2 classes that have the least business being NFA in the first place, but I digress.
I don't think I really need to extol the virtues of SBR, they kind of speak for themselves, and the only real downside to them is having to file Form 5320.20 to travel interstate.
Suppressors are my game, of course, and while most of us are aware that outside of .22s they don't achieve the kind of quiet represented in hollywood, they are still well worth it. Even when the decibel levels are still above what could be considered "hearing safe", they are a lot lower than without, so far less damaging if you do happen to light one off without ears. They will generally allow comfortable and safe shooting with just foam ear plugs versus doubled up protection, and they eliminate a ton of the noise that transfers though tissue and bone to your eardrums regardless of worn hearing protection. You can have the best plugs and muffs in the world, but they will not stop that conduction, which can still be quite damaging at high SPL.
And on that note, choosing the right suppressor(s) is going to send you down a rabbit hole. There are myriad considerations, and muzzle end suppression is frequently not the top priority, especially with autoloading weapons that typically have considerable port and piston pop regardless of can. Diameter, length, weight, durability, ease of installation, flexability/adaptability-all these things matter, and it's a game of trade-offs. Everyone wants a 4" long, 4 ounce, 1.2" diameter full auto rated suppressor that costs $200 and will sound like a brad nailer on everything from .22 LR to .50 BMG. Such unicorns obviously do not exist, and real "do-all" cans often excel in only one role (if any) while being pretty mediocre for other purposes, so we prioritize attributes and assess value.