Last office I done it hadn't been hoovered for a week and rammed with furniture with computers on top, I politely declined to go back to refit it...
I always use a foam one when I roll glues
Prime then f46 and roll addy
Id personally go for the ihygro tramex, thats what I'm upgrading to from my mms (original) once it sells on eBay/gumtree, get the reading faster.
Id not be expecting much for £30m2 to be fair for solid wood especially when you consider that £30m2 will include the vat and the companys profit...
conpressor set up outside and long long hose :)