here's what i recommend:
- Canon Mount Adapter EF-EOS R: saves cash, maybe bulky?
- SanDisk 64GB Extreme PRO SDXC UHS-II V90: fast, but pricey
tbh im happy with both, works well!

Seconding that! I had buffer issues, so get:
- Lexar Professional 2000x 128GB SDXC UHS-II Card
- Canon LP-E6NH Battery Pack
Battery life is honestly disappointing, so these are mandatory!!

Building on the earlier suggestion regarding DIY maintenance and setup, im satisfied with how a few specific ergonomic tweaks can really improve the technical handling of the R6. Coming from a DSLR, you might find the body a bit cramped with larger EF glass, so i recommend looking at structural add-ons.

• SmallRig L-Bracket for Canon EOS R5 and R6 2976 - adds much needed height for your pinky and makes vertical tripod swaps instant.
• ProGrade Digital SDXC UHS-II V60 Gold 256GB - i have zero complaints about write speeds here, and it handles the R6 bitrates perfectly fine for way less than V90 cards.
• Peak Design Slide Lite Camera Strap - the quick disconnects are great when youre switching between handheld and tripod work. Honestly, getting the L-bracket was the best thing i did for the ergonomics... it just feels more solid in the hand. The technical specs on the V60 cards are more than enough for the R6 unless you are doing heavy video bursts, so dont feel like you have to overspend on the highest end media right away.

Ok so, congrats on the upgrade! Since you are on a budget, one thing I think is CRITICAL but often overlooked for DIY enthusiasts is basic maintenance. Instead of paying a shop for professional cleaning every few months, you can save a ton of money by doing it yourself. I would definitely grab these:

• VSGO Camera Sensor Cleaning Swab Kit
• Giottos Rocket Air Blaster It seems scary at first, but there are heaps of tutorials on YouTube that make it easy to manage. Also, for the screen, dont bother with the expensive brand name protectors. I just use a generic ULBTER R6 Screen Protector tempered glass kit. It is basically the same quality for way less money and saves the LCD from scratches. If you want to save on lenses, ngl the used market for EF glass is still the best way to build a kit. Check out sites like MPB or KEH for older L-series glass. Resources like the Digital Picture website are great for comparing lens sharpness before you buy. Honestly, a used EF 50mm f1.8 is like the ultimate budget win for the R6 system!

Yep been there done that. Can confirm everything said above is spot on.

bump

100% agree

Congrats on the R6!! Its a technical beast, but to really maximize the data throughput and power efficiency, you need to think about the ecosystem beyond just the glass. I spent a lot of time analyzing the PD (Power Delivery) requirements for the R series and most people forget that the R6 is extremely picky about its power delivery handshake. Instead of just piling up extra batteries, look at these for a high-performance workflow:

• Anker 737 Power Bank (PowerCore 24K): This supports the 30W+ PD spec required to charge the body while its actually powered on. Most generic banks wont trigger the internal charging circuit properly.
• ProGrade Digital SDXC UHS-II Dual-Slot Card Reader: If youre using high-speed UHS-II cards, a standard UHS-I reader is a massive bottleneck. This handles the full 312MB/s bus speed for faster ingest.
• SmallRig L-Bracket for Canon EOS R5 and R6 2976: From a manufacturing standpoint, this beats the cheaper clones because it has a dedicated sliding side plate that doesnt interfere with the articulating screen hinge. Tbh, if youre on a budget, the SmallRig stuff is the way to go over premium brands like Kirk for similar tolerances. The market research shows these are the best price-to-spec ratio right now for the R6 body.

Bump - same question here