If they want to buy brand new my boy started with an FTX vantage which was good enough to get going. Spares are cheap and for the budget they could get a suitable fast charger and a couple of lipo batteries. That's the only thing I can think of for the budget.
https://www.modelsport.co.uk/ftx-van...products/40388
Otherwise they'll have look out for second hand on fleabay or the for sale section here for someone who is selling up.