Even if Newcastle's takeover happens, spending restrictions in place at domestic level in the Premier League (EPL) and at UEFA level will make it difficult for the club to spend astronomical amounts on transfer fees and wages.
The EPL's Profitability and Sustainability Regulations and UEFA's Financial Fair Play regulations (FFP) were put in place to ensure that clubs become more self-sustainable by breaking-even in the medium to long term.
UEFA, the EPL and the Football League all have different regulations setting out the acceptable losses that clubs are able to make. In the EPL, a club can make 'acceptable losses' of up to £105m over three years, and the figure is €30m (£26m) over three years for UEFA competitions.