
Kling 3.0 is solid, been messing with it myself. If you don’t want to commit to a subscription though, worth checking out https://vidhapi.app/generate-seedance-2-5 which lets you pay as you go for ByteDance’s Seedance 2.5, or the cheaper https://vidhapi.app/generate-seedance-2-fast option if you want to test things out first. Fewer restrictions than most of the mainstream tools too, which is nice if you’re tired of everything getting flagged or censored. Worth a look while waiting on the full 2.0 release.
Tech stack sounds fine honestly, Next.js can handle both your frontend and API routes/backend logic without issue, and it’ll scale reasonably well for a SaaS like this. The real bottleneck is going to be the video model itself and how you handle async processing since ghost mannequin generation isn’t instant, you’ll want a job queue and webhook setup rather than blocking requests.
Worth checking if there’s a pay-per-use option instead of committing to a subscription while you’re still validating demand, saw one for Seedance 2.5 at https://klifgen.app/create-seedance-2-5 that does pay as you go, which seems smarter than locking into recurring costs before you know your usage patterns or conversion rate.