I agree with @research.caddy. As much as I would like to recommend an SLA machine, and I would in a heatbeat if you were to make props in a professional setting, cost-wise is may not be the wisest choice and for big stuff the ugliness of the FDM parts is a bit less important.
The inconsistent smoothing methods I talk about for FDM are less of an issue with movie props/cosplay, and if you’re doing cosplay you’re probably going to sand, prime, sand, paint, sand, paint, varnish your parts anyway making the roughness of FDM print more an inconvenience than a no-go.
On the other hand (sorry in advance) : if you want to go big or go home, then buy a Moai 200. It’s expensive for a hobby, and you will have to budget for the resin which is more expensive than filament. With an SLA printer not only do you get comparatively “perfect” surface, but you can also add texture to your prints which will not resolve on any FDM printer. Look at this texture I added on some parts (not printed on Moai but on another SLA printer, not DLP or LCD) :
On the 2nd image you can see the same parts without the added texture (printed at 100um layer height). My goal was to remove the layer lines by adding some random surface state, but it turn out SLA printer with galvos (like the Moai) can resolve some pretty incredible stuff.
You’ll be able to print, wash your prints and apply primer directly without any sanding whatsoever, or very little. You’ll get smooth surfaces and sharp regular edges under most printing orientation, both of which are very difficult to achieve with FDM.