You can get a three motor vac for about a grand. An Str machine from ebay, for about £800ish for standard rubbing down. With the money you save, you could buy a dedicated 9" grinder for the heavier stuff.
What exactly are you intending doing mate? Maybe we can all help you nail down the perfect combo for you? Myself, I have following setup: Wolff samba with grinding/sanding discs Wolff neo for dedicated grinding with various dif segments for dif jobs M class extractor 3 dif pre separators (I like variation) lol I mainly do domestics and small commercial jobs (upto 200m2) odd This setup does me well
I keep trawling the internet for a decent dust extractor vacuum, something like the spe316 bag version. Anyone know any decent alternatives to this??