Hi Richard,
We have a team that do wood restoration on a daily basis.
The Bona machines are good quality bits of kit.
Definately go for them rather than the normal HSS ones that take papers instead of continuous belts.
A full set up consists of belt sander, edge sander, finishing sander (rotary machine) or lagler trio style dust extractor optional.
That little lot is upwards of £10k easily.
If you buy the right kit it will give years of service.
We went for Lagler stuff and its over 15years old and still working well.