Don't know much about him. The Arse team isn't that bad but it'll be tough to do any better with no budget. Maybe he'd get a better budget after the first season.
There has been a big misunderstanding about the budget.
People quote this £50m and they mistakenly believe that means "Arsenal have exactly £50m in *net spend* for outgoing transfers this summer". That's not an accurate understanding.
This is why the whole "net spend" invented by the media is misleading. What that number actually means is that Arsenal apparently have £50m in annual budget space available. That is not the amount of "net spend" available.
What people don't realize is clubs always amortize transfer fees over the course of the contract for the account.
So let's say Arsenal buy a player for a £40 million transfer and sign him to a 4 year deal. We do not then subtract £40m from the budget. We only subtract £10m.
So after buying a player for what is reported as a £40m transfer fee in the media, Arsenal still have £40m left to spend on their year to year budget.
That's the simplified version and doesn't include wages. But there is already wage space because Mertesacker and Cazorla contracts are down and some fringer players are moving on.